Go to your Android settings and allow installations from your browser. Install the APK: Download the file and run the installer.
There is currently no official Android port released by the original developer, LeftyKnave, on the main GameJolt page. The game was originally designed for PC (Windows). gamejolt sonic.exe spirits of hell round 2 android
Core Mechanics & Tips
Watch these walkthroughs to learn how to achieve specific endings and master character-specific levels: Go to your Android settings and allow installations