I'm not the biggest RPG fan, but I thought this was fun. I liked how the player was offered whether to heal or level up, it adds some strategy. (Maybe this is common, but I haven't seen it before.)
Are you limited to three party members? At one point, it seemed like someone was going to join me (the guy on the bridge), but the party left without comment.
The ending was a bit buggy. While the demon lord was on the ground, dead, an intact version of him (her?) was standing just fine behind it. Also, the option at the end to go back to the menu didn't work, I had to click to abandon the run.
Speaking of the demon lord, I definitely wasn't expecting that. In a perhaps fittingly anime-esque moment, they appeared the exact moment my mom came in the room, lol.