Zombie Derby: Pixel Survival is a driving-and-upgrading game: you drive through zombie hordes, run over what you can, shoot what you can't, and spend the earnings on a car that makes the next run go further.
The run always ends — that's the design. The question is whether you got far enough to afford the upgrade that gets you further next time.
Upgrades. Each run's earnings buy engine, fuel and weapon improvements, and fuel capacity is usually the binding constraint early on.
Each run ends when you run out of fuel or the car is destroyed — the progression is across runs rather than within one.
Yes — a light pixel-art game with nothing to install.