TubeSort
Support
Write to contact@citengam.com. Do not send passwords, Apple tokens, or payment card numbers.
How to play
Tap a tube, then tap another. The top color pours only into an empty tube or onto the same color. Each level starts with exactly one empty tube. A second empty tube is added from the shop or from a gift.
There are 1,000 levels. Every level is prepared in advance, so the same level is the same for every player. Levels 5, 10, and then every 25th level are a step harder. Every level can be solved.
Beside the level on the home screen, the path runs back to level 1 and ahead only as far as the next 25 levels. The current circle starts that level.
Coins and helpers
Pouring a color onto the same color adds one coin for each segment that moves. An extra empty tube costs 500 coins and is available from level 1. Undo costs 400 coins and is available from level 5. From level 25, 800 coins show the next 5 moves. From level 50, 1500 coins finish the level. A helper is hidden in the shop until that level. Ads do not give the five-move help or the whole-level help. Each stops at a stock of 99. The five-move help and the help that finishes the level still work after the player adds an empty tube. A rewarded ad can add 50 coins up to three times a day. An ad for an empty tube can be used again after 6 hours, and an ad for undo after 4 hours. The reward is added only after the ad is watched to the end. Turning the clock back does not renew these limits.
Backgrounds cost 500 coins or €0.99. Tube designs other than Classic cost 500 coins or €0.99. Classic is free. Coin packs are 600 coins for €0.99, 1400 for €1.99, 2500 for €2.99, 4500 for €4.99, 7000 for €6.99, 12000 for €9.99, 23000 for €14.99, and 37000 for €19.99. Coin packs are consumable. After Apple delivers them, they are not returned.
Three empty tubes cost 1350 coins from level 1. Five undos cost 1800 coins from level 5. Three helps for the next five moves cost 2150 coins from level 25. Two helps that finish a level cost 2700 coins from level 50. A pack is shown only when every piece in it is already unlocked. The Extra tab sells packs of one extra only. Empty tubes: 5 for 1750 coins, 10 for 2500, and 20 for 4000, from level 1. Undos: 4 for 1400, 10 for 2000, and 16 for 2560, from level 5. The next five moves: 4 for 2560, 9 for 4320, and 12 for 4800, from level 25. Finishing the level: 4 for 4800, 7 for 6300, and 11 for 8250, from level 50. The discount is not always half, and the quantity is not always 10. An offer that would go past 99 for the five-move help or the finish-level help cannot be bought.
Playing offline
Progress stays on the phone, so a level can be played without a connection. The shared leaderboard updates when the app can reach the server and the player is signed in with Apple.
The leaderboard
The list in the game comes from this server, not from the Game Center list. The score is also submitted to Game Center. The shown name is your nickname if you set one, otherwise your Game Center name. The Apple account name is stored and is not shown. A nickname has 5 to 15 characters, no spaces, and it is unique. The list keeps 100 places, ordered by level, then by coins.
Purchases after a reinstall
There is no Restore Purchases button. Remove ADS costs €4.99. It stops the ads between levels and adds 1000 coins and 5 empty tubes once. It does not add undos. When the app opens again, the purchase is recognized and that bonus is not added a second time. Coin packs are not returned by Apple after delivery. Backgrounds and tube designs bought with money stay with Apple. After reinstalling, the app applies them when Apple confirms the purchase again. If they do not appear, open the same product in the shop. Apple does not charge again for a product you already own. Optional ads in the shop remain.
If a purchase fails
Coins and items are added only after Apple accepts the purchase. If it fails, they are not added. The payment stays with Apple. If Apple charged you and the item is missing, write to support with the date. Keep Apple's receipt. Do not send a card number.
Turning the level ad off
Remove ADS costs €4.99. It stops the ads between levels and adds 1000 coins and 5 empty tubes once. It does not add undos. When the app opens again, the purchase is recognized and that bonus is not added a second time. There is no Restore Purchases button. The ad between levels starts at level 4 and then appears every third level. Levels 5, 10, and then every 25th level are exams and never show that ad. The ad disappears after Remove ADS. Optional shop ads remain: 50 coins at most 3 times a day, an empty tube every 6 hours, and undo every 4 hours. The reward is given only after the ad finishes. The game uses Google's test ad units. Real AdMob ads are not connected yet.
The app asks for Google consent. If the form does not appear, that is not treated as acceptance. On iPhone, Apple's tracking question comes next. The game works if you refuse. The game uses Google's test ad units. Real AdMob ads are not connected yet.
Deleting an account
Deletion is done in the game, at Settings → Delete account. With Apple signed in, local progress is deleted immediately, the account signs out, and saving stops. DELETE /api/account deletes the leaderboard row: the name, the level, and the coins. Purchases stay with Apple. Without an Apple account, the same screen deletes only the progress on that device.
Reporting a bug
Use the form or the email address. Say what you tapped and what the game did. The phone model helps. Leave out passwords, Apple tokens, and payment numbers.