The wands really should be switched with 1234 as well, I felt a bit trolled when I found out it was the mouse wheel (yeah, I didn’t stop to read the text). It made it harder for me, as my mouse wheel is very sensitive. In any case I didn’t switch too often, as the ice wand feels like an extra step, only useful for conserving some ammo.
Starting a level is usually dangerous in my experience, because of having no ammo and usually a couple of enemies with an interest in you. I died twice on the first level, managed to beat it (huge level btw, maybe shrink it down a bit) and immediately died in the catacombs to two zombies and two ghosts.
Very good job with the sound effects (love the pick-up one) and the ambient rain was lovely too.