Move - WASD, Talk to Prof. Tree - Touching Tree and click anywhere, Battle Options Choosing - Click, View Pokeydex - Space, Powkiman Encountering - Touch Grass. What to do: catch all the Pokemon. Things you can tell Tree to do: Heal Me, Give All, Bugs, Scream, Go Away.
Health bar code is from Griffpatch. Nothing else. At least it's less glitchy than Gen 9.