Pretty cool concept! I liked how simple it was to understand/play, yet it still had a lot of nuances.
It got really tense at some points.
I'd miss shots, panic, and then shoot a ton of bullets to swap directions. This'd waste ammo though, so afterward I was still stressed trying to save ammo.
I haven't gotten past the first level (my max was 34/50), but right now my goal is to study enemy movement patterns and perfect aim.