Link Crown | Color Connect Puzzle Game for Unity

Link Crown is a complete, ready-to-publish color connect puzzle game for Android and iOS, made with Unity 6. Players draw pipes to connect the dots of the same colour and fill the whole board. It comes with 450 levels, a daily puzzle, an endless mode that creates new puzzles on the phone, a Level Editor, themes, rewards, an ads layer ready for AdMob and Unity IAP 5 purchases.

Demo

Android demo APK: https://zaviro.net/link-crown/LinkCrown-Demo-v1.0.0.apk
Online documentation: https://zaviro.net/link-crown/

Demo Instructions

The game has no login, no user accounts and no admin panel, so no email or password is needed to test it. Download the APK above on an Android phone (Android 7.0 or newer), allow installing apps from your browser if asked, and open Link Crown. The demo starts like a fresh install of the game. It shows placeholder ads drawn by the game where ads appear in your version.

Gameplay

Connect each pair of dots with a pipe; pipes can’t cross; fill every cell to win.
Smooth drawing with rounded glossy pipes, a marker under the finger, pipes that are cut and come back as you draw, undo and restart.
3 stars for a perfect solve (one move per colour, no hint).
Hints that draw one pipe of the solution.
Animated tutorial on the first level and a How to Play popup.

Content

450 levels in 9 packs: 8 packs of square boards from 4×4 to 12×12 and one pack of shaped boards (heart, crown, ring, arrow…). Every level is proven to have exactly one solution, and each pack goes from easy to hard.
Daily puzzle: one new puzzle per day, the same for every player, with a streak bonus.
Endless mode: choose 5×5 to 12×12 and get a brand-new puzzle generated on the device, always with exactly one solution.
Packs open by playing, or early with coins.

Level Editor (in the Unity editor)

Paint dots and walls on boards up to 15×15.
Check proves whether a level has exactly one solution (exact solver, not a guess).
Solve, Generate (random level with exactly one solution, walls kept), Rate difficulty, Sort a pack from easy to hard.
Add packs and levels without writing code.

Monetization

Ads layer ready for AdMob: banner, interstitial (frequency and cooldown) and rewarded ads, Google UMP consent form (GDPR) and the iOS tracking prompt.
Only Google’s official test ad ids are included (in the Game Config, publisher ca-app-pub-3940256099942544). Import Google’s Mobile Ads plugin (free download from Google): the game switches AdMob on automatically and shows Google’s test ads. Then replace the test ids with your own App IDs and ad unit ids in the Game Config before publishing. Without the plugin the game builds and runs with no ads, and the editor shows placeholder ads to test every flow.
Unity IAP 5 (Google Play Billing 9, StoreKit 2): coin packs, hint packs, No Ads and a starter bundle; receipt validation and a hook for your own server; purchases never delivered twice; iOS restore.
Rewarded ads for hints, free coins, double coins and extra Lucky Spins.

Progress and rewards

Coins for every new star, daily puzzle streaks, a free daily Lucky Spin (coins and hints) plus extra spins for rewarded ads.
5 dot palettes and 6 boards to buy with coins.
Colour-blind symbols on every dot.
Signed save (HMAC-SHA256), clock-safe daily rewards, and an unfinished level kept for each mode (pack, daily, endless) when the app closes.

Technical

Unity 6000.0 LTS (built with 6000.0.84f1), uGUI + TextMesh Pro, portrait, phones and tablets with safe areas.
Clean C# in separate runtime and editor assemblies; the puzzle core (solver, generator, rules) has no Unity dependency.
One Game Config asset for every setting; every screen and popup is a prefab.
9 languages in one CSV file: English, French, Spanish, Portuguese, German, Italian, Indonesian, Swedish and Dutch.
Original art, music and sound effects created by the author (some UI graphics and sound effects are shared with the author’s Ludo Crown); no stock images or emoji sets.
Full HTML documentation.

Your own accounts and possible costs

AdMob and Unity IAP are third-party services. To show real ads, sell in-app purchases and publish the game you need your own accounts, and some of them cost money:

Google AdMob: your own AdMob account (free to create; Google’s terms and payment thresholds apply).
Google Play Console: one-time registration fee (US$25 at the time of writing).
Apple Developer Program: US$99 per year at the time of writing, and a Mac for iOS builds.
Store fees: Google and Apple keep a commission (usually 15% to 30%) on in-app purchases.
Unity: Unity’s license terms apply (Unity Personal is free within Unity’s revenue limits).

The documentation explains each step, including where to enter your own ids.

Requirements

Unity 6000.0 LTS (6000.0.58f2 or newer).
Android Build Support (Android 7.0 and newer) and/or iOS Build Support with Xcode (iOS 13 and newer).

Changelog

Version 1.0.0: first release.

Support

Questions before buying, or help after your purchase? Open a ticket on our support desk: https://zaviro.net/support. We answer Monday to Friday, usually within 24–48 hours.

Pre-sale questions are welcome. For item support, add your purchase code (on CodeCanyon: Downloads › Download › License certificate & purchase code).
Please try the Android demo and read the documentation first: most answers are there.
Every copy bought on CodeCanyon comes with an Envato license, and item support follows Envato’s item support policy.

Credits

Fonts: Fredoka and Lilita One (SIL Open Font License 1.1). Every other asset (art, icons, levels, music, sound effects) is original work created by the author; some UI graphics and sound effects are shared with the author’s other product, Ludo Crown.

Unity, Android, Google, AdMob, Apple and iOS are trademarks of their respective owners; their logos appear in the preview image only to show what the project works with.