Ooh I really liked the concept of this game.
Here some of the aspect I would review. The accuracy of attacks, it's not based on the cursor, or at least the character doesn't turn when attacking: it's based on the character orientation. But with such a distant view it requires a lot of precision, and I was a bit frustrated by not reaching enemies just next to my blade.
Also I think it's missing some kind of reward for each tile completed in the loop . Especially with the number or power of enemies increasing.