Direkt Very simple but surprisingly engaging once the mechanics are understood. Overall a relaxing game but I can foresee potential for complexity with more and more layers in future levels. Having instant resets is a subtle touch to keep the "action" going. The visual direction also contributes to it being a relaxing game.
If you do happen to change anything visually like adding color, maybe keep a monotone mode so that it's easy on the eyes before bed :) Also, mute button please~