This looks like a really fun concept, and i would love to see it developed further.
Infact there were lots of really good ideas listed below for features to add, and i have a few of my own worth mentioning.
Chat - Can be a simple thing, but with the limited selection of scenes a chat system would go a long way.
Skins - For the "hero" and the "Minotuar"
Multi-Multiplayer support - Add a feature to populate a room with a few different players or ...
Bots - Maybe make the hero have some kind of goal to achieve and have a few clones to serve as distractions for our horny monster to chase.
Not sure if anyone would see these idea's but i wanted to jot down my suggestions all the same. Still though, great concept.