LumijayonTap
Touch anywhere on the dark screen. Each tap sends a ring of light out from your finger.
Echoes of the Hollow
The cave is dark. Tap to light the way.
Send rings of light into the black, wake the Glimmers hiding in the stone, and find the Door to the next depth. Calm, quiet and made for every age.
Free to play. Works offline. No account needed.
How it plays
One finger, three steps, and a whole cave to discover.
Echo
The ring reveals walls, paths and sleeping Glimmers for a moment before the dark closes in again. Remember what you saw.
Find the Door
Somewhere in each depth is a Door. Reach it to descend to a new, never-before-seen cave.
Made for quiet adventures
Everything you need to explore, collect and share, with nothing you do not.
Endless depths
Every depth is generated fresh, so there is always a new cave around the next Door.
300+ Glimmers in the Lumidex
Wake and collect more than 300 creatures. Fill the Lumidex and hunt down the rare ones.
Daily Dark
One shared cave each day, the same for everyone. Beat your own best.
Campfire multiplayer
Gather friends on the same Wi-Fi or a phone hotspot and explore together. No internet needed.
Plays offline
The whole game lives on your phone. Airplane mode is welcome.
Kind to kids
No chat, no registration, no strangers. Just a nickname and an age band.
Coins become school meals
Coins you collect in the cave can do something real. Players can redeem coins into a shared charity pool, and Juvenstar Studios turns that pool into real donations that help feed children at school.
Redemption is always optional, and no one needs to watch an ad to take part. Adults aged 18 and over can also cash out coins earned by playing to PayPal; children never see this option and ad coins cannot be cashed out. Read the cash-out terms, the charity pool terms and our ads and rewards policy.
- Example reward
- Fund a school meal
- Coins needed
- 20,000
- How it is paid
- Pooled and donated by Juvenstar Studios. Never paid to children
Step into the Hollow
Free on Google Play. Rewarded ads are optional and never block your progress.
Questions
Is Lumijayon free?
Yes. The whole game is free. Optional rewarded video ads can give you extra coins or a rescue, and you can ignore them forever.
Do I need an internet connection?
No. Levels, the Lumidex and Campfire multiplayer all work offline. Coins and the Daily Dark sync with our server when you happen to be online.
Do I have to create an account?
No. There is no email, password or real name. The game creates a random device ID and asks for a nickname and an age band so it can apply suitable ad settings.
Are ads required to progress?
Never. Every ad is a choice you make, and the game stays fully playable without watching any. Read the ads and rewards policy.
Is it safe for children?
There is no chat and no registration, and nicknames are never shown over the internet. For under-13 players ads are non-personalized and treated as child-directed. See the children’s privacy notice.
How does Campfire multiplayer work?
One player starts a Campfire and others join over the same Wi-Fi or a phone hotspot. No internet or server is involved. Need help? See Campfire troubleshooting.
Can I delete my data?
Yes. Open Settings, then Delete my data, or use the web instructions.