this is a great idea and very polished, the juice makes the game very satsfiying! it was really diffucult to not die in a minute since marks can only be applied one at a time.
this art style is lovely and so is the concept i smiled when i realized how your game fit the theme, however i got stuck on the level where the red cube gets introduced, and the door placement made progressing a little annoying and the level was pretty difficult.