This is an engine I made for a game I'll probably never finish. I haven't submitted anything to the portal in a while, so I'm not too sure if the standards have changed on what will pass or not.
Move with the arrow keys, fire with the spacebar. If you leave the map, an arrow will appear where you left the map showing your position and orientation.
There are 3 blocks to blow up, and they don't attack or move. You can hit restart to respawn more blocks, or if you blow up.