Pretty good!
Very interesting setting for a game, and also fits very well with the core game mechanic. But on that note, I feel like you just threw a bunch of different stuff and power up ideas into the game, none of which really alter the way you play. In my experience it's much better to have a couple ideas and explore them to the max rather than a bunch of different mechanics that ultimately are just filler (I've made the same mistake before).
Interesting idea for a game, not bad at all.