Good concept, good execution, and ripe for more stages with more than 2 blocks.
But heads up, when I beat the last level I got to the leaderboard screen where the game immediately crashed, which froze the game window. My guess is it has something to do with the leaderboard, but the error message was a long complex string of unity assets and numbers, so I've no clue what the actual problem is. I'm using Firefox if that helps.