Zombie Defense

Hold one position, shoot what walks at it, and spend the money between rounds. Zombie Defense keeps the loop that tight on purpose: the aim is mouse-only, the shop opens when a wave ends, and the choice is always the same honest one — a better gun now, or the barricade that buys you the time to use it later. Waves hit harder than the last one every time, so the run ends eventually and the question is only how far the build got. Nothing to unlock between runs.