When random lag spikes and you freeze then unfreeze. Then zombies passed through your car and after you beat the level you're stuck to only restarting the lvl :/
that moment when you think you're going to win because you got lucky with 2 upgrade scrolls and the exact armors for your class. Then you miss click and died on floor 16 :/
For the game to perfectly fit your screen:
Right-click on the gray bar and select "this frame" and "open frame in new window" Then hit f11 to full screen it too and there you go.
Easiest way to get the badge/points is to drive on the middle lane on the opposite side of the road to get 'oncoming' bonus. When you see a car coming at you, you jump onto it and you may get 'speed reversal'. If you time it correctly, you can easily get 'takedown' or 'close escape' bonus too.
If anybody is having trouble with infest stages/enemies quickly make tons of Physics Labs + Destroyers + Seigeship should be like pooping out ships every second :P