Boss fight? Lol, just literally shoot him in the beginning, lay it on until he's 1 shot away from death, just before the end of the race, 1 shot kill him, yawn your way to victory
This game is kind of depressing heh... Depressing but true, life is a huge struggle, you literally fight your way through it only to lose in the end. Yikes! (Fun gameplay though)
Should throw a little humor in there to spice it up a bit. For example: Once you hit 1 million damage or something, bring up a leading cinematic or something suggesting "I wonder what this beastly weapon would do to poop?!" Then have a splatter in your face scene when we all of course give it a try :P
Question remains if this is multiplayer honestly? It seems like every other opponent has a number in the middle of their name, I can't imagine that's just a trendy coincidence?