Played both characters that were available, and beat the game as both. Highlight was the spell effects. I did feel that thunder was a bit overpowered.
In terms of menus, I noticed that Masteries kept resetting after each game. Not sure if that's a bug or working as intended. Additionally, while the HELP button does the job, I think it would be cool to add floating tool tips to what each of the skills do in the Mastery menu.
Also do you plan on adding controller support? It's not a necessary or vital feature but it would be a great quality of life addition.
Overall: It's fun and it looks nice, if a bit short. Good job.