It's playable, but it's just the same thing over and over. Add some polish, animations, and different sequences, maybe some powerups, then you'll have a good game.
Shoot - [Space]
Move left/right - arrow keys or [A] and [D]
Enemies get more difficult as you defeat each wave. See how many you can defeat while enjoying the high-octane chiptune soundtrack!
It's playable, but it's just the same thing over and over. Add some polish, animations, and different sequences, maybe some powerups, then you'll have a good game.