I think the core idea of the game is nice, because it has potential to become a small level-based series. If the gameplay elements are expanded in a balanced way, the idea could become much stronger — for example with better sounds, background details, visual feedback, and maybe more mechanics over time.
Since this type of game depends on quick and smooth level progression, the player should be able to move very fluently. My first piece of feedback would be about the square character: sometimes it feels like it gets stuck on the walls or corners. If you can improve this with a more forgiving movement/collision design, so the game feels smooth and easy to get used to, it would improve the experience a lot.
I also think each level should make the player feel like they are gradually learning a special pattern or rhythm that belongs to the game. That sense of “I’m getting better at this” can make the game more satisfying and memorable.
Congrats on the project — it is a nice start, and I think the idea has room to grow.