Very nice and creative idea with good execution. Some feedback:
- The bricks and background don't mash well together in terms of artstyle.
- Having sound always make a game better and not having it can really lowers your score at the end of the jam.
- The reset level button at the top sometimes gets in the way of wanting to click the blocks it covers.
- Good level design. However, I would change the first level to be something extremely easy to introduce the idea to the player.