Interesting game, but I was a bit confused on whether I should be breaking the game, or trying to beat the game. Some levels just felt impossible and I couldn't find a way to break it. Over all though, really cool idea.
I like the concept, humans being on the lowest end of the food chain, and you made it well. However, I think having something other to do that to just spam click would be good, and when I played it, it was very tough.
I'd say this is a pretty interesting game. I think maybe adding some more mechanics might make it better, but its still pretty cool. No glitches that I can see.
I like the idea for the game, and its relatively simple to understand. However, I could never defeat the hero, and the game kept going on seemingly forever. Perhaps make some kind of way to beat the hero? Overall though, nice job!