My Android game runs smoothly in the early stages but starts to slow down and eventually crash in several mid-game levels. The root of the problem appears to be performance-related bottlenecks that only surface in those specific areas. I need the crashes eliminated and the frame-rate stabilized so players can progress without interruptions. While you’re in the codebase, I also want to introduce a simple monetisation flow: a free trial build that lets new players experience the opening content, then offers an in-app purchase to unlock the full version. Google Play Billing integration, graceful trial limitations, and a clean “upgrade now” prompt are all part of the brief. Deliverables • Debug and optimise mid-game levels until no crashes occur on standard Android devices. • Create a trial version that locks content after the designated point. • Implement in-app purchase to unlock the full game, with purchase state persisting across reinstalls. • Supply a production-ready APK/AAB plus commented source code changes. If you’re comfortable profiling Android performance and wiring up Google Play Billing, I’d love to get this fix-and-upgrade published swiftly.