Fun game, but after a while I left with only one cow and UFOs stopped raiding me, which is weird. Also movement didn't feel good to me. Hit effects are great xD.
About the movement. I rechecked your game because I was sure that something went wrong when I played it, but didn't find anything. The only thing is that it would be nice to have a jump button. It was quite annoying to run around these fences. But maybe it was intended.