Katavasi

Use arrow keys to pilot. Press "Z" to fire. Press "Enter" to start the game. "R" will restart upon a game over screen. "F" will fullscreen in desktop versions. 

Enemies will spawn on each level. After a while, a wormhole will open that will take you down one level. Any enemies remaining on a level will be brought down with you. Both the enemy spawn count and the gravity of the wormhole will increase with each level drop.

This game is not compatible with all browsers. I recommend using Firefox. Chromium browsers will work only when hardware acceleration is turned on.