It took me a really long time to work out the controls as the shift key didn’t seem to do much at first, but that may be my keyboard as it soon started to work just fine.
I love the puzzles in this, although the ability for the diglet-esque creature to carry things took me a long time to figure out since the game established his ability prior as moving under walls, so I wasn’t expecting a second use.
That said the combination of possessing different creatures to get through the puzzles is great, I did something similar but it doesn’t have nearly as much purpose as it does here.
Great job, well done.