Pretty Good – Card Dungeon Review

This is overall a pretty good game, The issue I have is a glitch that happened. I had summoned a demon to help me fight a mini-boss, and the demon killed the mini-boss with hell-fire. However, after the tune played and I was told I had beaten the level, the demon turned on me and killed me with one spell. Is this intended?
Review by Minecraft6336 on Card Dungeon.