I loved the game 5/5, A few things I thought it could use would be: Maps, Varying difficulty levels, penalties when you die (xp loss, gold loss, restart in town, etc), Somewhere where you can go level up if you're low on power like an arena in town, or dungeon of randomness. All in all though it was great!
There's a pretty profitable system where you can run back and forth between two monster screens until a chest appears and then fight for it, that way you fight for a chest every time. I guess that's a bug, but not really sure how avoidable it is.
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