The developer has not uploaded a sonic vs sonic.exe yet...

have fun

Status	Released
Category	Game mod
Platforms	HTML5
Author	thaionuchiha
Tags	2D, Singleplayer
Average session	A few seconds
Languages	English, Japanese
Inputs	Keyboard, Xbox controller
Accessibility	Color-blind friendly, Configurable controls
Multiplayer	Local multiplayer

Development log

FNF Sonic.EXE vs Sonic Confronting Yourself