This was really fun! Thank you for sharing. Except for the comments already made about the spikes, only constructive criticism I'd like to offer is that once the player runs out of mana they're stuck. At least it appears that way? Unless they happen to make it back to one of those rooms that refill it but at that point it's quicker to kill yourself and start again. It might be an idea to include some form of weaker attack the player could perform to kill enemies and farm the resources required to make mana potions. All that said, thoroughly enjoyed it.