I'm not sure if I see your implementation of the theme, I almost fee like this game would've had its place in the last 1Bit "light and dark".
Still, always nice to see an fps in such a short timeframe. The movement felt really good and the differences between blessed and cursed skulls was a neat Idea. It's a bit sad that the player is encouraged to flee the skull so much, actually shooting them makes it really hard to dodge the new spawns.
I actually think that having a more damaging gun and faster ennemies would be the way to go. Solid entry anyway