Small but enjoyable gameplay loop.
Sounds were a bit all over the place, some more cohesion would've been great.
That the demons behaved somewhat buggy with their speed gave the game some nice change.
I would love to see a bit more change of the environment. Moving clouds, different enemies so the player has to change their playstyle.
Right now I sit my ass in the best spot and spam my gun in one direction, which gets boring quite fast.