I've grown quite fond of Pico-8, and am hoping to use it in a future Ludum Dare. To familiarize myself with the tool, I created an enhanced version of my LD33 entry.
Tapping Z and X at the same time toggles the music.
All feedback is welcome. If you find a level particularly difficult, please let me know.
Update 8/10/16 - Finally got around to fixing a bug with the tank.