Dino Run — a free endless runner you can play in one tab

A dinosaur, a desert and a horizon that keeps accelerating. Cacti come out of the ground and you jump them; birds come at head height and you duck under them. There is nothing else to learn, no lives and no levels — one collision ends the run, and how far you got is the whole score. The speed climbs continuously from the first step, so every run ends eventually and the only question is where.

It plays with one thumb on a phone (top half of the screen jumps, bottom half ducks) and with the arrow keys or space bar on a desktop. Free, instant, no download, and your best five distances stay on your own device.

How to play

• Jump: tap the top half of the game, or press Space / ↑ / W.
• Duck: hold the bottom half, or hold ↓ / S. Birds fly at head height.
• Ducking in mid-air drops you faster — the fastest way down when two obstacles arrive together.
• One hit ends the run. Your distance is the score, and it rises faster as you speed up.

The jump you can't take back, and how to time it

Every runner game lives or dies on one design decision: whether a jump can be cancelled. Here it cannot. The moment you leave the ground your whole arc is fixed, which means a jump is not a reaction — it is a prediction about where the ground will be a full half-second from now. At the speeds this game reaches, the cactus you are looking at when you press is not the cactus you will land next to.

That flips the usual advice. Most players jump too early, because an early jump feels safe: it clears the obstacle you can see. But your arc lasts a fixed time, and the world is moving under you the whole time, so an early jump lands you further along the track — right where the next obstacle is. Jumping later than feels comfortable is what lets you land in the gap instead of on top of the next cactus, and it is the single change that moves most players from a few hundred to a few thousand.

The second thing worth knowing is that ducking is not only for birds. Holding duck while airborne pulls you down faster than gravity alone, which shortens your arc on demand — the closest thing this game has to a cancel button. When a bird and a cactus arrive nearly together, the play is to jump the cactus and then immediately duck-drop so you are back on the ground and low before the bird arrives. Nothing else in the game gets you out of that pair. And because everything is speeding up continuously, a rhythm you have drilled at one speed will betray you a minute later: expect to re-learn the timing roughly every thousand points, and treat that re-learning as the game rather than as a mistake.

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