I have tried to use it on my PC. It gets past the title screen but then it freezes.Does your Data.rsdk file work on the PC version?
Make sure your file was placed in sd:/3ds/Sonic1/ (and not something like sd:/Sonic1/).
And if that doesn't work, grab an apk from Sonic Retro that isn't
I did place it on sd:/3ds/Sonic1/
I am now downloading the APK from Sonic Retro. I'll reply if it worked or not.