I was pulled in by the games description, however, i felt the gameplay doesn't quite emphasize that. the shooting was slow mainly cause i have to keep clicking... felt like my mouse button was about to pop off.
I recommend making the shooting a " Hold to shoot type " rather than a regular click.
The game also felt way too easy cause the enemy spawns didn't challenge me at all, i was expecting enemies to move towards me a little faster, and spawn a little more but that sadly didn't happen.
The inferno ( ish ) power didn't seem to have any effect, not sure if the other two did anything... honestly, the game really doesn't need a power system at this point, just fixing the shoot mechanic and enemy AI would go a long long way for this. the game already looks great and has a nice description ( I say that cause i enjoy very fast paced games so.... )
looking at your games gif again and seeing the gameplay, i'd say just take out the power totally if necessary and the gameplay score and health UI could also need some attention... ( But its a Jam submission so... )
Lastly, no COOKIES ! ! !