Super difficult, I gave it about 30 tries and only ever got kinda close. I would be really interested in seeing what the strategy is for winning here (it's gotta be spraying back and forth... right?).
I really enjoyed the visual style: the simple art, color schemes, and scan lines were all very pleasing to the eye, and gave it a cool 80's arcade vibe. I'm not quite sure what the green lines were, though.
Good job!