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Crystal Cave Flyer is a one-button 3D flight through an endless glowing cavern: hold Space, the mouse button, or a touch to climb, release to sink, and thread the circular gaps in the rock walls ahead. Crystals floating in the gaps add score, the cave speeds up as you fly deeper, and one wall clip ends the run.

More one-run games from the same shelf: Night Swarm Survivor and One Tap Platformer.

CRYSTAL CAVE FLYER

Original one-button cave flight built for this site (MIT). About 610 KB downloads once when you press Play - mostly the shared 3D engine - then it is cached. Best distances stay in your browser.

Hold Space / click / touch to climb, release to sink. R restarts after a crash.

Press Play to load the game.
Best scores use ftol:crystalcaveflyer:best.

Welcome - press Play to load Crystal Cave Flyer. About 610 KB downloads once (mostly the shared 3D engine), then it is cached; best totals stay on this device under ftol:crystalcaveflyer:best. Nothing is uploaded and no account is needed.

The whole game is one input: hold Space, the mouse button, or a touch to climb, release to sink. Every rock wall ahead carries a single circular gap, and the gap shrinks slightly as your distance grows while the forward speed ramps toward double the starting pace - so early runs teach the rhythm and later runs test it. Crystals float in most gaps and add 25 points each on top of the meters flown.

Because a run needs only one finger, it works as well on a phone held in one hand as on a desktop. A wall clip ends the run instantly, and a tap starts the next one.

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Frequently Asked Questions

What does Crystal Cave Flyer do?

It flies you forward through an endless procedural cavern. One input controls height: hold to climb, release to sink. Passing through each rock wall's gap continues the run; clipping a wall or the cave edge ends it.

Does it work on a phone?

Yes - the whole game is one touch. Press and hold anywhere to climb, release to sink. Desktop can use Space or the mouse button instead.

Is anything saved in my browser?

Yes. Your best distance-plus-crystal score uses localStorage key ftol:crystalcaveflyer:best. Nothing is uploaded.

What are the crystals worth?

Each collected crystal adds 25 points to the final score on top of the meters flown. Crystals float inside roughly six of every ten wall gaps, so lining up with a gap usually lines you up with its crystal too.