Good game and creative mechanism. I really enjoyed it. I got a few ideas that probably useful for your game.
- Since you used game maker studio 2 as the tool to make this game, you can also add 2D lighting to make your game brighter.
- Improve level design. Check this video to know how to do that.
I hope you can improve your game and even release an update in the near future.
I'm also a game creator. Can you check out my game? Here is the link.
https://hit-game.itch.io/square-game
I hope you enjoy my game like how i felt after played your game.