This one was neat, really creative idea that each room has two sides and you go into combat when you swap! Music was good and tilework looked great. Only nitpick is the battle system is EXTREMELY slow, it would've really benefited from less delay between each attack.
Also I'm curious, if this wasn't using a game engine what was it made in? Some kind of game framework like SDL, SFML, allegro? Or something more raw than that?