WASD or arrow keys to move. Click to launch an explosive rocket. Space to repulse, which can break a few blocks and push the enemy away. The enemy doesn't attack you, so I guess that you just get to blow him up. Also, you can't destroy green blocks and some blue ones.
Credits: I made everything in this game. Notes: If I make a game out of this, it will have a better platform, probably more enemies with more power, upgrades, and experience system and much more!