I need a fun, visually engaging math learning app built in Kotlin for Android phones and tablets, aimed squarely at children aged 7-9. The core experience should revolve around short games and interactive activities that motivate practice, paired with quick quizzes or test rounds so kids can see their progress immediately. Here is how I picture the flow: • A friendly home screen leading to themed “game worlds” (e.g., space, jungle, underwater) where each world introduces specific math skills. • Inside each world, mini-games deliver the instruction and practice; at set milestones, a timed quiz pops up to check mastery and unlock the next level. • A simple progress dashboard for both the child and the parent, highlighting stars earned, quiz scores, and areas that may need review. I’ll supply artwork guidance and rough wireframes; you handle full Kotlin code, clean architecture (MVVM is preferred), and integration of light sound effects. Everything must run smoothly on Android 8.0 and above and compile in the latest stable Android Studio. Deliverables 1. Complete source code in a Git repository. 2. Signed APK or AAB ready for internal testing. 3. Brief setup/read-me plus a one-page document explaining how new levels or question sets can be added. Acceptance criteria • All core screens and navigation functional. • At least two game worlds implemented with matching quizzes. • No crashes on common screen sizes (tested on emulator + two real devices). • Code passes lint and builds with no warnings. If you can also weave in optional flashcard-style drills later on, let me know; we can treat that as a stretch goal. Let’s create something kids will genuinely enjoy while mastering their math facts!