While the game is severely lacking in polish, I can say you've made some interesting choices with combat.
In most RPG Maker games, the guard command is almost completely useless, but giving it a heal and a lasting defense buff gives it a role. This, and the lack of reliable sources of magic points to make long term use of the healing spell creates a dynamic in the combat system very rarely seen in beginner project.
I encourage you to continue developing, learning functions of the engine and implementing them into a fleshed out experience.