Build a 2D lane auto-shooter with jet movement, protected dashes, configurable enemy volleys and phase-based bosses. Includes C# source and three URP demos.URP 17.6.0 with the included 2D renderer. Assign the supplied ArcadeURP asset in Graphics and Quality settings; follow Documentation/Manual.md. Built-in and HDRP sample materials are not included. Unity Registry dependencies are recorded in the package; no separate Asset Store purchase is required.Young Universe Arcade Engine provides the connected mechanics for a compact arcade shooter: move between lanes, dodge committed attacks, clear locked encounters and survive an Endless run interrupted by mandatory bosses.Configure weapons and combat actors through ScriptableObject assets. Replace the simple sample robot rig with your own sprites and animation. Use the runtime components in your own scene, or study Campaign, Endless and Boss Arena to see them working together.Included systems:- Kinematic 2D movement with jump buffering, coyote time, jet fuel and protected dash.- Horizontal lane-aware automatic fire with visible pooled projectiles.- Straight, sine, gravity and limited-seeking trajectory models.- Ground/flying pursuit examples with anticipation, release and recovery.- Boss attack decks, health phases, committed bursts, recovery movement and health supplies.- Defender-count combat gates and recurring active-play boss scheduling.- Coins, weapon purchases, damage/armor upgrade APIs and backup-recoverable local saves.- Keyboard, gamepad and sample touch controls, safe-area HUD and pause/retry menus.- Six enemy settings examples, three boss settings examples, three player weapons and three demo scenes.- Offline setup/integration manual and optional regression tests.This package is a mechanics toolkit. It does not contain the original Young Universe commercial game's missions, character artwork, music or story. The sample visuals are simple procedural robots with transform-based animation. Ground pursuit is raycast-based, not a complete navigation/pathfinding system.Unity: authored for 6000.6.0f1. Earlier releases are not claimed compatible.Rendering: URP 17.6.0. Built-in and HDRP materials are not included.Dependencies: Input System 1.19.0; Unity UI 2.6.0; URP 17.6.0. Optional tests require Unity Test Framework.Input: new Input System (or Both). Landscape demo UI.Source: C#, separated runtime, demo and Editor assemblies.Save: schema-versioned local JSON with backup; no cloud sync or encryption.Example limits: default 256 active projectiles, 64 pellets per release, 31 numbered weapon ownership slots, 20 levels per example upgrade track. Source can be extended.Not included: sound library, music, multiplayer, ads, in-app purchases, localization, moving-platform/slopes integration, online services or production artwork.Validated on macOS with Unity 6000.6: 10 Editor tests, 14 executable smoke checks, clean-project import and 34 compatibility-patched Unity Asset Store Tools checks passed. Domain Reload disabled was tested across two Play Mode entries. Android/iOS, Windows and long-duration performance are not validated. Offline documentation is included at Documentation/Manual.md. Support: hello@young-games.com. On first URP dependency install, Unity may report creation of its Global Settings asset; configure your URP pipeline as described in the manual.OpenAI ChatGPT/Codex assisted with gameplay and Editor code, tests, documentation and procedural sample robots. Code was revised through compilation, clean imports, automated checks and demo inspection. OpenAI image generation created promotional cover and icon artwork featuring Young Universe characters. Those promotional illustrations and the original game artwork, story and audio are not included in this mechanics toolkit. The trailer shows included demo gameplay; its original synthesized soundtrack is promotional only.OpenAI ChatGPT/Codex assisted with C# gameplay and Editor code, regression tests, documentation, and algorithmically generated sample sprites and robot rigs. The code was revised through Unity compilation, clean-project import, automated gameplay tests and rendered demo inspection. Sample art is illustrative; original-game commercial artwork and sound bundles are excluded.
