Nice concept, I can see the potiential it may have if you give it some more polish and features. I like the idea of bouncing around the scene to destroy the enemies (My own game even have a its gameplay revolving around that ^^) but that feeling is easily countered by the fact that the enemies moving in the opposite direction can stop you dead in your track instantly. Also, I don't really see the connection with the theme, it seems you're not using it either as a mechanic or even a constraint, it's a missed opportunity imo.
Apart from that, as I said it has a lot of potential. maybe with some more enemies dans mechanics, I could turn into a really good game. Nice job nonetheless :)