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.
Enjoy threading the gaps? Keep flying in Sky Gates Flight or chase speed with Hover Racing.
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.
Crystal Cave Flyer
Crystal Cave Flyer is a one-button 3D flight game. Hold Space, the mouse button, or a touch to climb; release to sink, threading the single circular gap in each rock wall. Press Play to start - a run lasts until you clip a wall.
Key features
- Height is the whole game - there is no left-right steering, only climb and sink.
- Each rock wall carries one circular gap, and the gap shrinks slightly as your distance grows.
- Forward speed ramps up with distance, toward about double the starting pace.
- Crystals float in roughly six of every ten gaps and add 25 points each on top of the meters flown.
- One wall clip or touching the cave edge ends the run; press R or tap to start the next one.
When to use it
Because a run needs only one finger, Crystal Cave Flyer plays as well on a phone held in one hand as on a desktop. Early runs teach the climb-and-sink rhythm; later runs test it as the gaps tighten and the pace builds.
Privacy and storage
About 610 KB downloads once, mostly the shared 3D engine, then it is cached for repeat visits. Your best distance-plus-crystal total stays on this device under ftol:crystalcaveflyer:best. Nothing is uploaded and no account is needed.
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.