We really had fun with the game. Our only comment is that we did not know if we won when there were no more enemies around. I don't know if there was a bug but celebratory music at the end would be a nice.

Neat idea! I like the intro music and the SFX in general. To expand it you could have pauses between rounds with sounds of different landscape elements to give a sense of progression/exploration. Some shouting cowboys and other voices might be nice too.

I like the concept. At some point I had horses left and right, the sound approaching and moving off again, but couldn't shoot anything.

Also no way to exit the game other than reloading the page.