Under the "Patches" section, ensure these are checked: Lock Framerate: Forces 60FPS to prevent physics glitches.

This game is designed to run at ; higher refresh rates (120Hz, 144Hz, etc.) will cause physics to break or the game to run at double speed.

Open the manager, go to the Game Config tab, and click Install Loader .

Right-click sonic2app.exe and Launcher.exe , select Properties > Compatibility , and set them to run for Windows 7 . 3. Essential Stability Fixes (Mod Manager)