Road Cross — a free browser crossing game, one tap per hop

A frog, a road that never ends, and a river in the middle of it. You move one row at a time — forward, back, left or right — and every row you reach is a point. Traffic runs across the hazard rows in both directions at speeds that climb with your score; the rivers have no bottom, so you cross them by landing on the logs and riding them until you can hop off. One touch from a car, one landing in open water, and the run is over.

It is built for one thumb: a tap anywhere ahead of the frog hops it forward, which is the move you make ninety per cent of the time, and swipes cover the other three directions. On a desktop the arrow keys or WASD do the same job. Free, instant, nothing to install, and your best five runs stay on your own device.

How to play

• Hop forward: tap anywhere above the frog, swipe up, or press ↑ / W / Space.
• Hop back, left or right: swipe in that direction, or use ↓ ← → / S A D. A tap well below the frog also hops back. You may drop back two rows at most — anything further behind you has already scrolled away.
• Cars kill on contact. Green rows are safe; you can stand on them as long as you dare.
• Water drowns you. Land on a log, ride it, and hop off before it carries you off the edge — the frog flashes red when you are running out of river.
• Don't camp. Stay on the same row for about four seconds and a hawk starts circling; two seconds after that it takes you.
• Your score is the furthest row you reach, and hopping backwards never takes it away.

Why this is a timing puzzle and not a reflex test

Every car in a lane is the same length and every gap in that lane is the same width, because a lane is generated as one repeating pattern rather than as a stream of random cars. That is not a shortcut — it is the point. It means the road is readable: watch a lane for two seconds and you know exactly how wide its gaps are, how long one takes to pass a given spot, and therefore how much time you get if you hop into it. Nothing is hidden and nothing is random once you are looking at it. What the difficulty ramp changes is not the fairness of the lane but the size of the reward for reading it: each lane guarantees a fixed number of clear frames at any point, and that number falls from around a second and a half at the start to a little over half a second by row seventy.

This is why greedy players die and patient ones do not. The instinctive move is to hop the moment the car in front of you passes — but a hop takes a fixed slice of time to land, and you are aiming at a gap that is still travelling towards you. Commit before the gap has arrived and you land where the next car will be, not where the last one was. The correct move is almost always to stand on a safe row, watch the lane you are about to enter, and start the hop so that you land at the leading edge of an arriving gap. Land at the leading edge and the whole window is yours. Land at the trailing edge and you have a handful of frames before the next car arrives, which is exactly the situation where players panic and hop into a lane they never looked at.

Two things follow from that. First, retreat is a real move and almost nobody uses it. Hazard rows always come in blocks of at most three, fenced by grass on both sides, so from anywhere inside a block you are at most two hops from ground you can stand on. If you land in a gap and the next lane's gap is nowhere near, hop back the way you came and try again — the lanes run at different speeds and in alternating directions, so their gaps drift in and out of alignment continuously and a corridor that was not there ten seconds ago will be there soon. Second, that patience has a price, which is the hawk. You cannot simply wait forever on one safe row for a perfect alignment, so the game becomes a question of how much reading you can do in four seconds — which is a much better question than how fast you can tap.

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