Port a GameCube game to PC

Yes, if you own the game or hold a license. You rebuild it in a modern engine and export desktop builds. Summer Engine generates playable scenes from a description of the original, lets you edit in C++, GDScript, or C#, and exports for Windows, macOS, and Linux.

They need a designed mapping rather than a direct one. A partial press can become a key or mouse button, and the full press click can become the same input with a modifier or a second button, with clear on screen or audio feedback so the player can tell the two states apart.

Yes, and it usually improves the game. The C-stick was small with a short throw, so camera speeds tuned for it feel slow with a mouse or a modern right stick. Retune sensitivity and expose a slider along with an invert option.

In the per user application data directory for each OS: AppData on Windows, Application Support on macOS, and the XDG data directory on Linux. Add autosave and multiple slots, since those were limited by memory card blocks rather than by design.

Because console hardware was fixed and PC hardware is not. Logic written against a constant frame rate runs faster or slower on different machines and refresh rates. Convert frame counted values to time based ones, use a fixed physics timestep, and test both uncapped and at a low frame rate.