Neat game, love the art! Funny premise, too. That would certainly trigger me to start an alien genocide lol.
Anyway, the grammar is a bit strange (I'm guess you're not a native speaker?) but nothing too distracting. I found the controls a little weird. For some reason, I kept getting move and aim mixed up. Maybe it would be less awkward if all the shooting controls were all on one hand? For example, arrows to move and wasd + space to aim and shoot?
Very solid despite a few problems. Nice work!