Loved the intro animation and the sound effects on it! Great to see a tutorial, it felt really polished!
Extra collectables were a nice touch, certainly made me stop and consider where they might be hidden quite a lot.
The gameplay and controls were overall good but would sometimes feel a bit unfair, especially being 'squished'. I also really struggled to use the building blocks without just immediately crushing them... . but these issues are very much a problem with my skill and common in these sorts of games, they are meant to be hard! I definitely think you smashed it with what you managed to do in 3 days! really impressive!
I am Mad at Karl.... i wish I'd noticed the preview screenshot and not fallen for the trick 😂