Build colorful side-view roller coasters with 17 modular track prefabs, snap-ready continuous circuits, four-car trains, and a separate physics jump-and-collect example.Built-in Render Pipeline only. URP and HDRP are not supported in version 1.1.1. Included keyboard demos use the legacy Input API; set Active Input Handling to Input Manager (Old) or Both. No external dependencies.Create modular, side-view roller coasters for Unity 2D projects.Roller Coaster Construction Kit 2D includes two independent examples. Build a continuous circuit with 15 Entry/Exit-based track modules and run the included four-car train examples in ConstantSpeed or SimpleGravity mode. For an arcade alternative, use one Rigidbody2D jump cart to cross a deliberate gap between separate takeoff and landing ramps, collect sky tokens, and reset the example for another run.Included content:17 track prefabs: 15 continuous modules plus 2 physics-jump ramps4 support prefabs, including a height-adjustable support4 path-following car prefabs, 1 physics jump cart, and the Puffy Orb rider2 gameplay prefabs: Collectible_SkyToken and Jump_AutoTrigger6 station and park prop prefabs3 playable demos and 1 complete parts galleryOffline English and Japanese documentationCore features:Entry/Exit connector snapping through the included editor placement windowBaked lightweight track meshes with configured EdgeCollider2D componentsFour-car spacing and bogie-based orientationLift, brake, and station target speedsLooping, speed control, reset, and orthographic camera followReusable trigger-based collectibles with one-time or repeat collection, respawn delay, pickup feedback, counter events, and UnityEvent hooksOptional automatic jump triggerCompatibility and requirements:Minimum editor: Unity 2022.3 LTS; validated in Unity 2022.3.22f1Render pipeline: Built-in Render Pipeline onlyDemo input: Input Manager (Old) or Both; Input System Package (New) only is not supportedExternal dependencies: noneThe jump cart and continuous train are separate systems. The two jump ramps do not form one CoasterCircuit2D. The included corkscrew is a stylized side-view interpretation, not a physical 3D corkscrew. Save-game persistence, inventory UI, networking, music, and sound effects are not included.Design origin: this kit is a clean, reusable reimplementation of the 2D roller-coaster concept created for Chihuahua Games' released title LOST IN LOST JAPAN. The original game's character, regional setting, level data, UI, audio, Steam integration, original collectible artwork, and game-specific logic are not included. One publisher-owned screenshot is included under Documentation solely as provenance; it is not runtime content, reusable kit content, or a listed product feature.Unity version: 2022.3 LTS minimum; tested with 2022.3.22f1Render pipeline: Built-in Render Pipeline onlyInput: included keyboard demos use UnityEngine.Input and require Active Input Handling = Input Manager (Old) or BothDependencies: none; no external Asset Store assets or third-party packages are requiredContent:35 prefabs total17 track prefabs (15 continuous track pieces and 2 separate physics-jump ramps)4 supports6 vehicle/rider prefabs (4 path-following cars, 1 Rigidbody2D jump cart, 1 rider)2 gameplay prefabs6 station/park props4 scenes (3 playable demos and 1 parts gallery)18 C# scripts (16 runtime, 2 editor) in separate assembly definitions5 lossless PNG source shapes at 100 PPU2 included materials using Unity's built-in Sprites/Default shader11,760 total baked mesh vertices1 Unity unit = 1 metre; 0.5-unit placement grid recommendedPackage behavior:Runtime code uses standard UnityEngine APIs; editor tooling uses standard UnityEditor APIsNo analytics, telemetry, network calls, account systems, or API keysNo save system, inventory UI, networking, music, or sound effectsNon-uniform and negative scale are not supported for track placementURP and HDRP materials, renderer assets, and validation projects are not includedOpenAI ChatGPT assisted the author with implementation work on the early working prototype. The prototype's concept, game design, system requirements, visual direction, testing decisions, and final selection were created and directed by Chihuahua Games before the author began using Codex.OpenAI ChatGPT and Codex were used as implementation assistants for C# drafting and refactoring, documentation drafts, naming review, iteration suggestions, and production checks while the author rebuilt the prototype as this commercial asset package. Chihuahua Games designed and supervised the product, chose the 2D scope, specified the new round character and redesigned cars, reviewed and revised the outputs, and retained final editorial and quality-control responsibility.The author-added value includes rebuilding the original idea as a custom modular Bezier track system with baked meshes, colliders, connector snapping, train control, adjustable supports, reusable Prefabs, demo scenes, documentation, and production validation. The complete deliverable was compiled, tested, and visually reviewed inside Unity.The source shape sprites are deterministic programmatic graphics created specifically for this package. No third-party artist style, trademarked character, or copied Asset Store content was requested or used.This package also includes one publisher-owned screenshot from LOST IN LOST JAPAN (Steam App ID 4531750) solely as provenance documentation. It is not represented as runtime content, reusable toolkit content, or part of the product's feature set.
