I like it!
Here's a few suggestions:
I finished the game on my first try, so maybe making it a bit harder?
I had a bit of trouble getting the swipes right. Maybe it's easier on a tablet than on a phone? Would be nice if the game would "guess" your intended move a bit, so if you swipe and select two bricks, it automatically finishes the swipe with whatever brick follows the first two.
The sound effect when I select a brick doesn't feel satisfying. Maybe some "popping" sound or something?
Since the level up is timer based, it can pay off to drag the time out. And when the player starts doing that, it kills the gameplay.
