2D Mobile Sleep Game

I have a simple, family-friendly concept for a 2D game built specifically for mobile devices (iOS and Android). The core idea revolves around guiding a character into deep, uninterrupted sleep by managing light, sound, and timing mini-puzzles that appear as “dream disturbances.”

Here’s the scope I need covered:
• Design and program a lightweight mobile build that runs smoothly on common mid-range phones.
• Create charming, hand-drawn-style sprites along with a small set of looping background tracks and ambient sleep sounds.
• Implement a short progression system (roughly five night-time levels) that gradually introduces new sleep-disrupting mechanics.
• Integrate touch controls that feel natural—taps, drags, and simple swipe gestures—without multitouch complexity.
• Package the project so I can submit a final build to both Google Play and Apple App Store, complete with basic settings (mute, language toggle) and a single in-app purchase to remove ads.

Acceptance criteria
1. A playable APK/IPA that installs and launches without crashes on standard test devices (Android 11+; iOS 15+).
2. Asset folder with editable source files (sprites in .PSD or .PNG sequence, audio in .WAV).
3. Clean, well-commented project source in the engine of your choice, handed over via Git or ZIP.
4. A concise hand-off document outlining project structure, ad removal hook, and steps for future level expansion.

If you have shipped 2D mobile titles before, especially ones with relaxing or casual mechanics, your expertise will fit perfectly. Let me know your estimated timeline and which engine you prefer so we can lock in milestones and get this sleepy adventure underway.