Here is my entry in the J4K competetion. It’s a simple twitch game. Just keep going until you lose all your lives. You get an extra life every 6000 points.
http://24.103.107.96/swarm.jnlp
http://24.103.107.96/swarm.html
http://24.103.107.96/swarm.jar
Main class is G if you run it standalone.
Arrows move left right up down. WASD switches sides.
I appreciate any feedback.