Arrow keys to move, z to jump, x to attack, space to start/restart. Click on upgrades to choose them.

Hold e as you click space to restart to make yourself progress faster (I'm not sure If this improves things, but its after midnight in my timezone and I'm too tired to balance)

There are twelve enemies, 23 arenas and 50+ enemy combinations.

The different colored areas have there own waves of enemies that can spawn, the black one is the final level, it repeats its nine combinations infinitely with no upgrades (the difficulty on this level is very high, it would be very impressive to survive 3 waves)

Unfortunately there is no audio, I left it too late and anything i could have added would have subtracted from the game.

Sorry for the rant, enjoy the game, negative feedback welcome :)