How to beat the final boss: - avoid laser (obviously) - ride on the left side of the street so you will get nitro. - with nitro, speed to the outer left/right side of the spaceship. Jump from your car from left/right side to the green platform to destroy it. It does not work if you jump frontal. - This has to be done 3 times (left, right, then center). - For center save some nitro as you have to drive on the grass which slows. rate up so others can see this
In Firefox Zoom out the page with "Ctrl + (MINUS)" or the through the menu. The Flash Window should shrink too and with smaller distances it is easier be faster than your opponent. (This maybe works in other browsers too)