Arrow keys, space to fire, escape to quit.
I've exagerated the explosion in this demo to show off the physical effect explosions have on objects around them, but there are some notes in the readme about how to turn this effect down if anyone was so weirdly inclined.
Oh, and you can change the resolution and stuff through the settings.xcs file. xcs files are just text files for those who have not been paying attention to my journal.
Comments, criticism and complaints all welcome below.