Up arrow moves you up, Down arrow moves you down, and Space bar shoots. You can only have one bullet on screen at a time so aim well.
Each wave is 100 seconds (1 minute 40 seconds), Survive! After each wave the zombies get stronger in some way: Wave 1: Normal Speed, 1 zombie every 4 seconds Wave 2: Double Speed, 1 zombie every 4 seconds Wave 3: Double Speed, 1 zombie every 2 seconds Final Wave: Double Speed, 1 zombie every second, shots pierce through multiple zombies Let me know if you like it, and let me know about any glitches (besides the 3rd timer turning into NaN instead of X) If I get enough feedback, I might make add-ons including more levels and new weapons.
