Unity Mobile Prototype: Small Dreamdale-Style Island With Character Movement and Collision

I am looking for an experienced Unity mobile game developer to create a very small prototype. This is not a full game. This is only a technical prototype to test basic movement and collision mechanics for a casual mobile game inspired by games like Dreamdale / My Little Universe / Forager / Outpath / Everdale The prototype should include: 1. A small square island/map * Simple semi-3D/isometric style * Most tiles should be sand/ground tiles * Some tiles/areas should be black blocked collision areas * The player must not be able to walk through blocked areas * Island should be big enough to scroll up and down when moving 2. A simple player character * Can use free/placeholder assets * Graphics can be downloaded free stuff * Character should move around the island using touch/finger control on mobile/ipad 3. Basic mobile controls * Tap/drag joystick style movement is fine * Must work on mobile or be easy to build/test on mobile 4. Collision * Player can walk on normal ground * Player cannot enter black blocked areas * Movement should feel smooth and responsive 5. Deliverables * Unity project source files * Short screen recording of the prototype working * Basic instructions for how to open/build the project Important: This first task is intentionally small. I am using it to evaluate cost, speed, code quality, and whether the developer understands this style of mobile game. Please include in your proposal: * Estimated fixed price * Estimated delivery time * Examples of similar Unity mobile/isometric games you have worked on This should be a clean, simple prototype. No combat, no inventory, no resource gathering, no backend, no monetization, and no advanced graphics are needed for this first version. Keep it very simple but make it feel smooth. See attached video recording for what I am looking for.... https://www.youtube.com/watch?v=WcDxBSDnmvs NOTE! I only want the scrolling, moving, collition part for this version. If you are the right person for the job we will do all the other mechanics later.