ONLY ONE SPELL

In this unfinished game, your task is to clear the dungeon, but as luck would have it, you spend all the spells and you only have a magic crystal that you can throw at enemies. Will you be able to clear the dungeon with a piece of mineral or will you be doomed to death? W,A,S,D - move Left Shift - dash LMB - shoot ESC - pause alt+f4 - close window to select a crystal, come closer to it