Hey thanks for playing and your huge feedback ! I totally agree that the upgrades could have an impact on the shadows and lights, but have you noticed that the powerups only affects the shotgun as it is the "vampire" and they come from blood ? The game's diegesis would have to be changed slightly to modify light and shadows too, even if gameplay wise it would be a plus !
There's no wave system : For each upgrade took you have 8 max zombies that can spawn + 1 every 2,5 s (initial spawn time is 0,25 s). I wanted to prevent a no choice option for the player, but you're making me reconsider it !
Also side note, the shadow mechanic is kind of hacky as it is implemented, I'd rather have dynamic lights/shadows and obstacles. There's a lot of room for improvement ! If I recall correctly, in the initial design, Vanilla suggested some switches to turn light on/off at specific places - that would have been interesting too.
Thanks you again for the feedback !