Am I supposed to be able to move? It feels like I should be able to or else this is way hard.
On the first time a bullet hits an enemy I think there might be a hiccup where the game stalls.
Minimalist design is nice.
It`s not meant to move. Mouse only. You should generally target the enemy that is closest to you. Turret rotation before upgrades is a bit slow, so priority should also be given to whatever enemy is more or less aligned.
