Awesome game! I love how customizable the game is. Both graphics and music are great.
There's a bug when showing the minimum time to get the next star. Instead of showing the time to get the second star, it shows the time for the third one. This makes sense when you already have the second one, but not when you only have the first one.
Also, when selecting the next level, it shows the next time of the following level, and again, with the same bug as before.
I'm adding a video showing this.
Overall this game feels pretty much finished. I saw that you're getting ready to sell it on steam, so good luck on that.
If I may, I would like to give you a suggestion. In your trailer the palette selection it's not explicitly shown. You show the different colors, but one could think that this is part of the levels, like in "Baba is You" for example. A clip with a gameplay, or even a static scene, changing colors over and over would look awesome. I'm saying this because customization is very appealing for some people, so it definitely will catch some attention. I'm not that fan of customization and I was very hyped when I saw it and even took my time to see all of them to choose one.