Comet Courier Mobile Game Kit is an English-language, dependency-free HTML/CSS/JavaScript source prototype for a small fictional courier game. The sample arena includes pointer/touch-sized and keyboard steering, momentum and braking, shifting gates with collision, parcel pickup, dock-based delivery and score rules, win/loss state, and Start/Pause/Reset controls. The package includes the sample-level data, input/rules documentation, mobile-layout guide, tuning notes and setup/demo instructions. This is a small browser starter, not a finished multi-level game, native iOS/Android app, APK/IPA or game-engine integration. Unzip and open index.html with JavaScript enabled. Layouts and pointer controls are intended for responsive browser use; actual phone hardware, cross-browser behavior and native-engine compatibility are not guaranteed. Progress is session-only and resets on reload; no persistent save, cloud service, payments or store integration is included. Code-drawn sample graphics are part of the demo, not a separate sprite or 3D-asset library. The actual demo screenshot shows the delivered browser interface. Other covers are concept illustrations; the legacy invented-phone-UI poster retained in the archive is not an application screenshot or a promise of extra game art. License: one limited, non-exclusive, non-transferable license for personal use or one internal project. You may edit and use the included files inside your own game project. Do not resell, sublicense, redistribute, upload, share, bundle, publish or give original files or modified standalone versions to another person or marketplace. Do not use the files to create a competing asset pack, template, source-code product or game kit. A limited portfolio screenshot is allowed only when downloadable source files are not exposed. Ownership remains with the seller; see LICENSE.txt for full terms.