Single Line Block Fill — Puzzle Game Android Template

A complete, ready-to-publish Android puzzle game with 600 levels, AdMob ads, daily challenges, achievements, and a full reskin guide.

Single Line Block Fill is a polished, production-ready Android puzzle game built with Jetpack Compose. Players draw a single continuous line to fill every tile on the grid—simple to learn, endlessly challenging to master.

With 600 hand-crafted levels across 10 themed worlds, a full coin economy, power-ups, daily challenges, and achievements, this is a complete game—not a prototype. Buy it, reskin it in under an hour, and publish it to the Play Store.

✨ Key Features

Gameplay

• 600 levels across 10 unique worlds (60 levels per world)
• 8 special tile types: Key/Lock, Gate/Switch, One-Way, Ice, Portal, Trap, Bonus
• ⭐ 3-star rating system based on hints used, undos, and attempts
• Power-ups: Undo, Eraser, Hint, and Auto-Fill
• In-game tutorial system with contextual overlays
• Gameplay Reference screen for all tile types and power-ups

Progression

• 10 themed worlds with sequential unlock system
• 20 achievements across 4 tiers (Bronze → Legend)
• Daily Challenge with 3 difficulties (Easy, Normal, Hard)
• Daily login streak tracking with rewards
• Theme Studio — unlock and apply world themes

Monetization (AdMob)

• Banner ads on Home, World Select, and Level Select screens
• Interstitial ads after level completion (configurable frequency)
• Rewarded ads for double coins and free power-ups
• In-game coin economy with a dedicated Shop screen

Developer Experience

• ⚙️ Centralized AppConfig.kt — all reskin values in one file
• Every function and class documented with KDoc
• Step-by-step RESKIN_MANUAL.md included
• ️ Buyer-editable constants clearly marked with // ← CHANGE THIS

️ Technical Specifications

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Platform	Android
Language	Kotlin (100%)
UI Framework	Jetpack Compose
Min SDK	API 26 (Android 8.0)
Target SDK	API 35 (Android 15)
Architecture	MVVM + Repository
Persistence	DataStore (Preferences)
Serialization	Gson
Ads SDK	Google AdMob (Google Mobile Ads 23.x)
Build System	Gradle (Kotlin DSL)
IDE	Android Studio

What’s Included

Project Structure (High-level)

SingleLineBlock/ ├── app/src/main/ │ ├── java/com/example/singlelineblock/ │ │ ├── config/ AppConfig.kt (centralized reskin config) │ │ ├── engine/ GameEngine.kt, HintSystem.kt │ │ ├── ads/ AdManager.kt │ │ ├── audio/ AudioManager.kt │ │ ├── core/ GameServices.kt │ │ ├── data/ GameRepository.kt, EconomyManager.kt, │ │ │ LevelLoader.kt, LevelCatalog.kt, │ │ │ DailyChallengeManager.kt │ │ ├── model/ All data models (fully documented) │ │ ├── viewmodel/ 10 ViewModels (fully documented) │ │ └── ui/ All screens, components, navigation, theme │ └── assets/levels/ 600 levels in JSON format (10 world packs) ├── RESKIN_MANUAL.md Step-by-step buyer guide

How to Reskin (≈ 30 Minutes)

1. Open AppConfig.kt — update app name, support email, and website URLs
2. Replace the 4 AdMob IDs with your production IDs
3. Update applicationId in build.gradle.kts
4. Replace the app icon
5. Build, test, and publish

Full step-by-step instructions are included in RESKIN_MANUAL.md.

Requirements

• Android Studio (Hedgehog or newer)
• Google AdMob account
• Google Play Developer account (one-time $25 fee)
• Basic Android/Kotlin knowledge is helpful (but not required for reskin)

Support

This item includes 6 months of item support as per CodeCanyon policy. For support requests, please use the CodeCanyon comments section or contact via the support email provided in your purchase.

Support includes:

• Help with the reskin process
• Bug fixes for issues in the original code
• Answers to questions about the codebase

Support does not include:

• Adding new features
• Custom development work
• Issues caused by buyer modifications