I enjoyed your game! Like others have said, the spear mechanic to leave the boss fight was difficult, but I didn't give up, and I managed to get out. You did a great job implementing all the environmental and character sprites, the game looks great. I think the level design is nice as well.
I would say that having a faster melee attack would have been nice - it did feel a little slow. Also, having enemies react more to getting hit may help combat a bit. The fire mages, for example, would keep shooting me, even when I was hitting them with my sword. Having some hitstun for them might make me more willing to charge in and attack instead of hitting once and running away again.
Overall though, great work!