Aiming as a feature was something i messed around with, but i'm not sure if it could really fit, as it would probably break the level balance (from all the precise spots, though i might be able to remedy some bits with limited ammo and some arrow only/player only walls. It would make the game more about precision shooting, though that would be quite interesting)
I've added some alternative keys in a new build, for arrow key and spacebar users, will submit it after the jam finishes :]