Free download offer: 6–19 October 2026
The £0 sale is scheduled from until . In the UK, that is 01:00 on 6 October to 00:59 on 20 October.
You can join and opt in now. Wait until the sale starts to download, and check Google Play shows Install, Free or a zero price. If any charge appears, stop and contact support.
No promo code is needed during this offer. Google may take time to display the updated price. The first free download through this new process still needs to be confirmed by a tester.
For teenagers and adults with a compatible 64-bit Android phone running Android 11 or newer. Use the same Google account for every step as you use in your phone’s Play Store. The game and instructions are in English.
Join the tester group
Sign in to Google, open the group and select Join group. If you are already a member, continue to step 2.
Join the Google GroupBecome a tester
Open the link below and select Become a tester. Continue when Google confirms you are a tester. Joining the group alone does not enrol you in the closed test.
Become a testerDownload during the free offer
On your Android phone, follow the Google Play download link on the tester confirmation page, or use the button below after completing steps 1 and 2.
Open the game on Google PlayOnly install when Google Play shows Install, Free or a zero price. Do not pay. No code-claim or Redeem code step is needed. After the sale ends, new downloads may show the normal price.
If Play says the app is unavailable, open the tester link in your normal browser rather than inside Facebook, check the account matches your phone, and confirm group membership and tester opt-in. Availability also depends on your Play account country and device compatibility. Allow time for changes to appear; contact support if you are still blocked.
If the game is already installed, use Update when offered. Please do not uninstall it to troubleshoot: that can remove your saves.
Play and send honest feedback
Please play over the test period and stay opted in continuously for at least 14 days from when you join, even if the free download offer has ended. There is no need to leave the test after downloading.
Try the controls, puzzles, text, sound and saving. Send crashes or confusing moments, your phone model, Android version and game version to jim_robbo@hotmail.com. Remove personal information from screenshots. No public rating or positive review is requested.
The Level 1 candidate has been tested on a Galaxy A14; other phone models are part of the test. Later levels are not included and newer iOS additions are not all included. We cannot promise reciprocal testing of other apps.