As a puzzle game enjoyer, I liked this one. In terms of QoL, it can be better with some very small touches:
-I would like it if the button tutorial stayed up. I confused the 2 buttons rather often, wanting to break a block but shooting instead.
-If you implement the feature above, you can keep the levels as they are on a fail, and allow the player to make adjustments.
-Markers. Allow the player to mark blocks. I often forget which block I wanted to shoot at.
Otherwise, great job. I got stuck at the checkers level, which I understand is the last level. It feels like it might be possible, but it's too much guesswork for me.