I liked aiming the weapons around and the choices of weapons, but after playing for a couple of minutes I only ever saw one enemy. After playing a second round I came to the conclusion that the enemies only spawn in one spot, and that I was shooting them from off screen. So I let the game run for a few minutes, with my slow cannon shooting straight to where I thought the enemies spawned. I never saw another enemy. So with all that said, this game just needs more enemies and they need to spawn at random heights.

its pretty fun, i like the look of your health system. the only problem i had was with the colliders, especially it seemed on the little guys and the helicopter.