Use the arrow keys to turn space to shoot. Try to beat your high score/world record. Keep fighting off the other ships for as long as you can. The two little icons by your ship show you what super attacks you can do. Up arrow for spray. Down arrow for missile. Up and down for wipe. Ships: Disc: Common, small, faster, not that powerfull. Boxer: Less common, slower, more lives. Shooter: Rare, slow, more lives, shoots bullets. Mother Ship: Rare, slow, more lives, clones babies. Mother Ship(baby): Common (if mothership present), about the same stats as a disc.
OCTOPUS: Built in a couple of days. Just a little side project. Don't know if you would consider this dumb... Sound effects from @Tommy100 Updates: 10-4-16: New power up. Wave; wipes feild. Minor bug fixes with Shooter. New more dramatic music. 10-1-16: Added special attacks (missile and bullet spray). Minor bug fixes with Shooter and Mothership. 9-30-16: Added shooting miniboss