My first thought is... gosh the menus are so slow! It's really frustrating, and in the real world I'd have immediately moved on to a different game 🫠 especially considering that the pace of the gameplay is much better once you actually start! One other major thing to note is that this game is completely unplayable for anyone with red-green colourblindness, which is the most common type. I also really don't like the "some platforms are fake" mechanic, generally in games you want the rules to appear consistent otherwise the player will get mad.
It's not all bad, though! I love the speed of the character, and the change size mechanic is interesting if a little underutilised. You've implemented the theme well, and stuck to the spirit of the "limited shapes" theme which I love to see.