Tunnel Flip guide: reading the walls, building a combo and clearing all 20 stages

Tunnel Flip is a runner with one idea attached. Your cube is not on the floor of the tunnel — it is on a wall, and the whole game is about choosing which wall to be on while the tunnel comes at you. Everything else (combo, stars, gems, ranks) is built on top of that single decision.

Tunnel Flip 3DRoll a glowing cube along tunnel walls, flipping left and right to dodge barriers and turn near misses into a combo.Play free in your browser →

The one control

Tap the left half of the screen to roll onto the left wall, or the right half to roll onto the right wall. Swiping in that direction does the same thing. On a keyboard, the arrow keys and A and D work. Escape or P pauses.

That is the complete control scheme. The tunnel has four walls, and a flip always moves you one wall clockwise or one wall counterclockwise, so from your point of view a flip is just a move to one of the two walls you can see.

A tap fires on release, or after 120 ms if you hold still, so a swipe never fires a wrong-side tap first. You can be sloppy with your thumb without paying for it.

Stage 1-1 opens with four coach cards. The game actually stops and waits until you tap the correct side, so it is worth doing the tutorial rather than skipping it — it teaches flip, flip back, collect a gem, and escape a two-sided trap in that order.

There is a tilt option in the pause and how-to panels. It is off by default and needs motion permission on the phone, so plan on tapping.

Reading the tunnel before you reach it

The radar along the bottom is the most useful thing on screen and most people ignore it. It has one segment per wall relative to you:

• A red segment means there is a solid barrier on that wall in the next band.
• A blinking segment means a laser gate, which pulses between solid and passable.
• The number beside it is how far that band is, in metres.
• When the nearest band is within about 24 metres and one side is clear, that side's on-screen pad lights up. That pad is the game telling you which way to flip.

The generation rule behind this matters: for every band of barriers, the game guarantees that at least one wall you can reach with a single flip is free. So a band is never a dead end — if you cannot see an escape, you are reading it too late, not facing an impossible wall.

From sector 4 onwards every band has at least two barriers, which usually means both visible walls are blocked and the escape is one flip further round. Those sectors can also stack two bands back to back at close spacing, so the safe line is sometimes two quick flips in a row. That is the whole difficulty of Storm Core and Solar Crown.

Close calls and the combo

A close call is the game's signature move: flipping away from a solid barrier that is between roughly 0.25 and 6.5 metres in front of you. It is worth 25 points × your multiplier, and it counts as one step of the combo, exactly like a gem.

• Every 4 gems or close calls, the multiplier goes up by one.
• It caps at ×5.
• Go 4 seconds without either and it drops one level — the timer resets, so you lose levels one at a time.
• Any hit resets it to ×1, shield or no shield.
• Gems are worth 10 points each, multiplied, and often come in trails of three.

Two things follow from this. First, playing safe is survivable and playing close is simply worth more: a ×5 close call is 125 points against a gem's 50. Second, the decay timer means you should keep moving toward something — a gem lane or a wall you are about to leave late — rather than coast down a clear stretch.

Sectors and stages

Speed roughly doubles across the set, and so does the pressure between bands: bands are spaced about 12.9 metres apart in the first sector and about 17.3 metres in the last, but you are moving faster, so the time between one band and the next drops from roughly a second to roughly half a second. That is why the last sector feels nothing like the first even though the distances are similar.

Since the game stores no timing data, treat any figure here as an estimate: dividing each stage's length by its running speed puts a full stage at roughly 25 to 45 seconds.

Stars, gems and the rest of the loop

Stars are three independent marks per stage, and each one you earn is kept forever:

1. Finish the stage.
2. Collect 70 % of the gems it spawns.
3. Finish without a single hit — a shield block still counts as a hit.

That matters for unlocking: each sector opens only after you clear the fourth stage of the previous one and hold 6 / 15 / 26 / 38 total stars. Missing the gem mark on early stages can leave you short even with a clean run sheet.

Gems are the currency, and they go further than you would expect. A new star is 15, a first stage clear is 20 to 60 depending on sector, a rank-up is 100, a 7-day login streak pays out daily. Spend them on a shield (40, absorbs one hit) or a magnet (30, pulls gems from every wall for 20 seconds) chosen before a run, on cube skins from 150 up to 1800, or on a revive after a crash — 50 for the first, 100 for the second, twice per run, inside a 5-second window.

Two cube finishes cannot be bought: one for reaching 3000 m in Endless, one for clearing stage 5-4.

Endless, Daily Run and the radio

Endless climbs forever. Every 500 metres it changes sector colours and difficulty, and past 2500 metres the speed keeps rising to a hard ceiling. Every 500 m milestone has exactly one world first.

Daily Run is a fixed 1000-metre tunnel, seeded by the date, so everyone plays the same one that day. Gems count double and the first clear of the day pays 50.

After every run, Tunnel Radio gives you a pilot callsign and one line of commentary based on how that run went — distance, gems, close calls, top combo. If you are offline, the game falls back to a set of built-in lines, so you always get something.

Three habits that raise your score

• Watch the radar, not the tunnel. The pads lighting up is the fastest reliable read you will get.
• Hunt close calls late in a run. The multiplier is already high and there is nothing left to protect, so the greedy line is the cheap one.
• Save revives for sector 4 and 5. At 50 and 100 gems they are cheap insurance exactly where a two-flip band will end you.