Oh boy, this game is tough. Enemies are both cruel and relentless and every encounter is a tense struggle. You start off with 0 mana at every stage, so you have to try to defeat enemies with your basic attack, which is possible if you get them stuck on a corner, or run past them to find a chest with some mana inside. Once you get the means to use the summon spell, then it gets easier. But you can still get annihilated in seconds by a single enemy. Controls are a little weird (QSD? why are they not on a row?).
Challenging but fun game, great music and art, I'm impressed!