I wish it had more puzzle elements instead of being a collect-a-thon. Maybe making you travel back to previous areas, slowly collecting parts of a bigger code? I also think the sky area with disappearing platforms was a bit empty and not as strange as the other two. But the concept of the codes were fun to interact with! It reminded me of that minecraft april fools update where you could go to new dimensions by throwing a written book in a portal.
I hope you check out my game as well! https://itch.io/jam/brackeys-15/rate/4313365