I love the aesthetic. The concept and gameplay are also great. I did find the death from picking up another coin of the same color confusing at first. I also found overall difficulty to be a bit high on some stages but I did enjoy the puzzles.
One thing I'd recommend is to not show the menu after death, but just immediately respawn since so much of the game is trial and error - it would be less frustrating to die if you could just try again immediately :)