Like the idea, but I didn't really understood what happened when I breeded monsters together. Would have been nice to have a way to tell how the stats of the new monster would be modified based on the parent, maybe with a random luck factor chance thrown in there.
Except for that, solid art and nice gameplay loop.
A music slider would have been nice :P
P.S. I think I encountered a bug? The wave says there's 1 enemy left, but it never comes and the next wave button doesn't show up :(