I liked the design on the level and enemies. I think there are some good game design ideas in here as well.
It could use some more polish, as you said in the description. Some sound effects, and greater impact when dealing or taking damage would be nice. I also found that it took so long to fill up the mana gauge that I didn't get to use the special spells.
I also encountered a few bugs with rooms not loading, and I defeated the big wizard, but it didn't seem to do anything?
I still enjoyed my time with it, and I hope you continue making games and improving in the future. ;)