Does it keep earning while I'm away?

It does. Your helpers earn Crystals passively, and you'll collect capped offline earnings when you return.

How do I earn faster?

Buy more buildings, purchase Boosts, and ascend to bank Geodes — each one permanently multiplies your output.

What does ascending (prestige) do?

Ascending resets your Crystals and buildings but grants Geodes that boost every future run, so you grow much faster.

Can I play on my phone?

Yes, it's fully touch-friendly and works on phones, tablets and desktops with one-tap controls.

Is my progress saved?

Your progress saves automatically in your browser, so you can close the tab and pick up right where you left off.

👆 Crystal Cave Keeper

📖 View Web Story

Crystal Cave Keeper drops you into a vast underground crystal cave and dares you to build the most luminous crystals empire on the web. It all starts with a single tap on the cavern: each press mints a little Crystals, and Descend cavern by cavern to crack open ever-larger crystal geodes.Spend what you earn to hire helpers like Little Spelunkers, Busy Spelunkers and eventually Cosmic Spelunkers. They keep working even after you stop tapping, so your Crystals ticks up every single second — close the tab and you'll come back to a tidy pile of offline earnings. Stack boosts such as the "cavern Festival" to multiply everything, then chase achievements that hand you a permanent edge.When growth slows, ascend to bank Geodes: each one you hold quietly supercharges all future runs, turning a slow start into an avalanche. It is built to play itself while you watch the counters climb, and it runs instantly in your browser on phone, tablet or desktop — no download, no sign-up. Fire up Crystal Cave Keeper, find your rhythm, and see how big an empire crystals can buy.

How to play

Tap or click the cavern (or press Space) to earn your first Crystals.
Open the Buildings tab and buy Little Spelunkers to start earning Crystals automatically.
Reinvest into stronger helpers like Turbo Spelunkers and Cosmic Spelunkers as costs climb.
Grab Boosts and unlock achievements to multiply how much Crystals you make.
When progress slows, hit Ascend to bank Geodes for a permanent boost, then climb faster.

Controls

Tap or click the subject to earn (Space or Enter also taps). Press number keys 1–9 to buy buildings, P to ascend and M to mute. Fully playable with touch on mobile.

Features

Most luminous crystals theme set in a vast underground crystal cave
Five upgradeable helpers from Little Spelunkers to Cosmic Spelunkers, each with its own boosts
Idle income that keeps earning while the tab is closed, with capped offline catch-up
Prestige system: ascend to bank Geodes for a permanent, stacking multiplier
Achievements, satisfying tap combos, sound effects and an automatic local save