Aquarium Puzzle Engine

A complete toolkit for creating Aquarium logic puzzles in Unity: generate procedural puzzles, create levels by hand or from sprites, and store full-color final puzzle layouts.

Features

• Procedural puzzle generation with a time budget and optional difficulty targeting (Easy/Medium/Hard);
• Editor workbench for authoring puzzles by hand, from a solution sprite, or from a hand-painted water mask;
• Built-in solver: validates a board and checks uniqueness/solvability;
• Dependency-free play field model (water pouring, crosses, mistake checking, completion);
• Full-color final layout reveal on completion;
• Level collections and registry, organized by theme, size, or difficulty;
• Thematic level ordering and an optional per-category economy/reward layer;
• Content validator for catching orphaned or misconfigured levels before shipping;
• No-code sample: two pre-wired, playable menu + gameplay scenes, wired entirely through the Inspector;
• No third-party dependencies: pure C#, works with Built-in, URP, and HDRP.

Supported platforms

The runtime assembly has no third-party or native dependencies, so there's nothing platform-specific to port.

Supported platforms (Editor)

Windows, macOS, and Linux. The engine is pure C#, no native plugins or OS-specific tooling.

Requires

Unity 6000.2 or newer.

The Unity UI package (com.unity.ugui) must be installed.

Nothing in the code requires anything past plain C# 8/9, so it may well work on

older LTS releases too, but that hasn't been tested and isn't guaranteed.

Link to documentation

https://aquarium-puzzle-engine.laisarre.icu/documentation

Aquarium Puzzle Engine is a Unity toolkit for Aquarium (Water Sort/nonogram-style) logic puzzles: procedural generation, a validating solver, level authoring, and runtime play logic, all as a single self-contained package.

Content is fully customizable. Puzzles can be generated procedurally at any size from 5×5 to 30×30, authored by hand in the built-in workbench, or generated from a solution sprite. Board-size categories, rewards, and difficulty targeting are all data-driven through a shared game config, so you can reshape the puzzle set for your own game without touching code.

It fits any project that wants a logic-puzzle mode or minigame layer: casual and hyper-casual mobile games, puzzle-hybrid meta layers, or a standalone puzzle title. 

The engine only owns puzzle rules and data. Rendering, animation, and screen flow are yours, with an optional uGUI view template and a full No-Code Integration sample to start from.