I've been doing heavy science with the Japanese version. (Just to re-reference it is here as of 13 March, 2014: http://www.mediafire.com/download/gv86kufqpqmp6cq/SimYukkuri_skin201400304.zip)
I'm going to edit in the UI and menu items here as well as general observed game behaviour as I experiment. This isn't a translation - Eternity's gonna have that out in a matter of hours - but I'm hoping to give myself and everyone else translating dialogue a bit more context as to what triggers what. For those of us who don't actually know Japanese, we can work on intent.
=The pink pyramidal cursor remains a bit of a mystery. It is the selection cursor for the UI display on the lower right but appears to only work on certain yukkuri - that is, only some yukkuri can be selected by the player and have their stats displayed. Many tools ONLY work on said selectable yukkuri though any yukkuri can be moved, at the very least. There's been theories that only nicehead yukkuri can be selected whereas shitheads can't. I'll confirm/disconfirm that as my next step.
=Log button is straightforward. Push to activate log. Push again to deactivate and return to main screen.
=Row of Three Buttons with picture labels
==The Crossed Out Speech button is straightforward, it hides all the speech bubbles.
==Green Cursor button is disabled by default. When activated, it puts a green cursor around any yukkuri you have favourited (see below) which helps you keep track of specific ones in a large herd.
==Crossed Out Question Mark deactivates the tooltip prompt which lets you know when you can Shift-Click and Ctrl-Click on certain tools.
=UI List on the Right (10 items)
==UI1: Environmental Stress. Goes up by 1 for each yukkuri on the field including corpses. Does not increase even if the yukkurarium is an absolute cesspit. No change here.
==UI2: Yukkuri Status- (I think this is just a heading for the below?)
==UI3: Favourite Button. This lets your favourite the selected yukkuri. You can do this to any number of yukkuri provided you can select them; if you can't select them, you can't favourite them either. You can see green cursors aroud them if you activate the Green Cursor button above.
==UI4: Personality. Unknown if implemented. Code has provisions for five levels of personality ranging from "Ultra-Good" to "Dogesu" which I'm guessing means shithead.
==UI5: Intelligence. Unknown if implemented. Code contains provisions for "Badge Class", "Average" and "Beanpaste-for-Brains"
==UI8: Hunger: One Reimu tested began actively looking for food (and becoming upset that there wasn't any) at 80%.
==UI9: Taste. Unknown if implemented but may be intended to indicate how rarified the yukkuri's taste buds are. Displayed kanji means "average".
==UI10: Poo Poo. This is what we know as expired paste.
=Bottom Right Icon Area. Not usually visible since most yukkuri don't have icons, but it's there. Raper Alices display an erect penipeni icon. Examining the icon folder reveals icons for predatory status as well as states disabling pooping and pregnancy.
=Hotkeys and General Interface=
Rightclicking on the field now brings up the menu.
Escape: Toggle pause.
Delete: Cleans all poop and bodies.
H: Removes all yukkuri from the game.
*Testing has shown that the pink cursor can be placed on yukkuri prone to being nice and cannot be put onto yukkuri prone to being rude.
*Generally, tools only work on selectable yukkuri - ones you can put a pink cursor on. However, this requirement can be bypassed somewhat by using shift-click and ctrl-click functionality. Prolly a bug.
=Top Level Menu (11 Items) EDIT: Whaddaya know, I found where the list is located in files.
===Punish. Causes pain without rendering airborne. Deals about 1% damage and 1% stress about 2/3 of the time. Only works on selectables, including unborn stalk babies.
===Snapping. Does about 1% damage and 0-1% stress to a Child Reimu and tosses her, dealing another 6-7% damage and 4% stress upon landing. Only works on selectables, including unborn stalk babies which seem to soak damage surprisingly well and will not fall off.
===Pickup. It is now possible to catch yukkuri in mid-air. Doing so and setting them down doesn't always prevent all fall damage.
===Vibrator. Works as before. Only targets selectables
===Healing Orange Juice. Works as expected although it cannot target untargetable bad yukkuri either, which is strange. You'd think they couldn't get enough of the OJ. Can be mass sprayed for heals.
===Lemon Spray. Puts yukkuri to sleep. Only works on targetables. Can be mass sprayed to put everything to sleep.
===Hammer. Scares (whether this is Scare, Alert, Fear, Scream or what precise trigger is unknown atm) yukkuri from the cursor after it is used. Does about 25% damage and 15% stress to an adult Reimu. Just under 50% damage to child yukkuri and 34% stress and one-shots babies. Leaves a pile of beanpaste that is cleaned by the Clean-Poop function but is not treated as poop by the auto-toilet. At least some yukkuri seem to eat it without complaint but even a baby will finish a large pile in one gulp.
===Extract and Inject. Functionality alternates, so first it extracts, then injects. Essentially impregnates the second target with paste from the first. Cannot be used on untargetables nor mass targeted so it cannot affect shitheads. Causes mammalian pregnancy. Extraction deals a very small amount of damage. Injecting does more. Overinjection (7 shots for a baby reimu) causes target yukkuri to explode.
===Braid Pluck. Standard targeting rules. Obviously alarms the yukkuri but doesn't seem to cause any long term distress.
===Anal Plug. Makes yukkuri unable to poop, adding relevant icon to its bar. Makes them explode spectacularly. Unplugging them during the critical phase makes them go into diarrea for a while.
===Stalk Cut. Makes them unable to gain stalk pregnancy, causing a little stress. Does not affect existing stalks. Targeting the yukkuri a second time will toggle the state off - Stalk Unplug is not what does this.
===Castration. NOT what it says on the tin. Prevents mammalian pregnancy but does NOT prevent the yukkuri from CAUSING it. It does not cut off anyone's penipeni.
===Stalk Unplug. This is what ACTUALLY cuts a stalk off a yukkuri. This causes the babies on it to rapidly die. Putting the detached stalk into OJ doesn't help - the babies have to be taken off and put directly into the OJ pool. However, they will presently remain comatose forever despite gradually growing. On the other hand, they can become pregnant and children they give birth to will not be comatose. Stalk physiology in this game is worthy of a textbook.
===Lighter. Deals rapid damage over time. At about 33% damage, the yukkuri will lose its accessory. While a yukkuri is on fire, its hunger will not grow and it will spread fire to nearby yukkuri. A comatose yukkuri as above will move in its sleep while remaining in its coma.
===Water. Puts out fire. It will wake up sleeping yukkuri and make them distressed but only very repeated clicking will do actual harm to non-babies.
===Orange Ampule. Attached to a yukkuri and keeps its damage at 0%. Acts as life support and can keep comatose and burning yukkuri alive indefinitely. Will test further. There may be a yield limit.
===Accel Amp: Puts a light blue ampule on a targetable yukkuri. Greatly accelerates growth to maturity.
===Stop Amp: Puts a dark blue ampule on a targetable yukkuri. Stops yukkuri from growing any further.
===LEMON_POP("ラムネ", "Lemon pop"),
===Auto-feeder. This can now be programmed to dispense any of the above OR a random live baby yukkuri.
===YU_CLEAN. Cleans up all living yukkuri.
===BODY. Clears corpses away.
===SHIT. Clears away all poop.
===ETC. No idea what this cleans.
===ALL. Both poop and corpses.
==Toggle Accessory. Can only target "selectable" yukkuri but non-selectable yukkuri can still be affected via the Shift and Ctrl modifiers. Shift-Clicking will toggle all - using it on a yukkuri with an accessory will remove all accessories from all yukkuri. Ctrl-click will invert the state of all yukkuri on the field, putting accessories on those without and removing them from those that have them.
==Toggle Pet Clothes. Same as above.
==Furniture. These are objects that don't move on their own. Most can be toggled on and off via right-click.
===TOILET2. This toilet notably clears away poop automatically. It CAN be toggled off, though it doesn't change appearance so it's hard to tell whether it's on or off.
===Sticky plate. Holds one yukkuri at a time. Prevents conveyor from moving said yukkuri.
===HOT_PLATE. Burns feet. Takes several seconds to ramp up. At yellow light, the yukkuri is crippled and cannot jump or move quickly. At red, it is completely still.
===FOOD_MAKER("フードメーカー", "Food maker"),
===DIFFUSER. A stationary object that ticks certain effects. It has a setup screen when placed - tick all that you want to apply. From top-left, counting right and then down, they are: Anti-Mold, Steam (causes mold? who knows), Orange (presumeably heals over time), Growth Accelerant, Growth Stop, Anti-Dosu (prevents Dosu from spawning but does nothing to existing Dosu) and Anti-Yu (deals massive damage over time and triggers ginormous red text boxes).
===BREED_POOL. There's now 4 options which appear to be speed settings. Needs testing.
===GARBAGE_CHUTE("ダストシュート", "Garbage chute"),
===MACHINE_PRESS("プレス機", "Machine press"),
===PRODUCT_CHUTE("製品投入口", "Product chute"),
===GAP_MINI. A line that can only be crossed by medium and large yukkuri.
===GAP_BIG. A line only crossable by large yukkuri.
===NET_MINI. Crossable only by small.
===NET_BIG. Crossable by medium and small.
===WALL. Crossable by nothing.
===//WATER. Commented out but indicates some plan to re-implement water surfaces.
===ALL_DELETE. Deletes all barriers. A welcome addition.
==Mobiles. Generally objects that do move.
===BALL. A desireable treasure for yukkuri. If a yukkuri touches one, it will start gaining stress rapidly whenever it is out of contact with the ball while it is physically accessible.
===YUNBA. Deploys a bot. The robot will perform various tasks that you could perform with the tools except it can freely target shithead unselectable yukkuri.
===YUNBA_SETUP. Programs the bot using a setup screen. From the top the columns indicate age of t argeted yukkuri. Checked box means that size of yukkuri WILL be targeted for the tasks along the left which are Clean, Heal, Mold Removal, Punishment for Rudeness (needs testing), Accessory Removal and Death. Then from top-left counting to the right and then down, the next four boxes govern general non-targeted tasks - Corpse Removal, Removal of Accessories from Corpses, Poop Removal and Stalk Removal. The next five boxes are targeting boxes based on the yukkuri's attitude. They are Rude, Smart, Average, Super Rude and Super Smart. When a box is checked that means yukkuri of that category WILL NOT be targeted.
===SUI. Drops a cart for yukkuri to ride but currently causes a crash in short order.
===TRASH. Yukkuri who have lost their accessories will visit a trash pile to find a replacement.
No changes here. Notably, the "front" of the yukkurarium is towards the top of the screen.
==Shouts. These are things you yell into the yukkurarium and the yukkuri all react to it.
===Take it easy!
*Generating 100 Child Reimu produced:
-5 Wasa Reimu (4 bad, 1 nice)
-8 Deibu (all bad)
-87 Reimu (37 bad, 50 nice)
Overall a half and half split but because of Deibu, the regular Longbraid Reimu is slightly prone to being good. I think it's safe to say all Deibu are bad by default. Jury's still out on the Wasas, statistically speaking.
*Bad Child Reimu have vastly inferior toilet discipline.