I managed to get the game working just fine, but I encountered some issues in-game, like being unable to access the upgrade area after winning (only after losing, and this only occurred once in my entire play through) and how every attack/jump button keeps doing the same attack. It also seems that spamming the same LMB attack over and over again results in winning every time.
However, the presentation is very good. I love the little creatures stuck behind the bars in the background, the character designs and the hero drinking a potion during the fight. All really nice touches, I just think that the core systems in the game need a bit more tweaking and cohesion. This is a cool idea that could easily be taken further!