sbfsociety/Jumpoff — reverse-engineered prompt

I want you to turn this into a small but actually playable Jump King style game in C++ using SFML 3. The repo already has some graphics, audio, and system files, but the README says the original attempt failed, so please treat it like a rescue and finish pass rather than trying to preserve every broken piece.

Make it feel like a simple vertical platforming game where the whole challenge is timing and power on jumps. It should open cleanly, build with CMake, and run as a desktop game. Give me one basic level with platforms, gravity, collision, a player that can stand, charge a jump, and launch, plus a camera that follows progress upward. Add simple sound and basic visuals if they fit what is already started, but keep the scope modest and focused on solid movement and a complete playable loop.

Please clean up the project structure as needed, fix whatever is incomplete, and leave it in a state where I can build and play it easily. If anything about SFML 3 is unclear, look up the current docs online.