Really cool runner game, a title screen with a quit, controls, credits (for your team in game) and a start button would really help with the overall professionalism of this game, I found myself taken by surprise by it just immediately starting like that not knowing how to play and wasn't really ready to either.
A cooldown for the attack would be nice too so you can't just spam left click and win. Solid game though and a big fan of the randomly generated level, very nice touch to the replay-ability. Great game.