Good game, but grapics are messed up

I am playng this game on my MacBook Pro with Mountain Lion. When it starts up, If I choose max grapic settings, it goes off screen, but if i go lower, it sticks to the bottom left corner of the screen. Would be 5 stars, but I cant untill the grapics are fixed.

DScheeps about RC Mini Racers, v1.6