I really liked the concept !
I found it quite challenging, we don't have a lot of room to be able to both dodge and aim. Plus the limited ammo make that if we didn't manage to kill ennemies, we stay stuck in limb.
The visual are simple and clear, we can easily identify the different type of foes,
Audio is enough to make everything coherent
One caveat however, there are high stake goal for the seriousness criteria.
Nice job ! Especially for a solo dev !