Sonic Run 3 is a fangame of Sonic The Hedgehog.
It started development in 2010 and had a REALLY BAD demo for SAGE(Sonic Ameteur games Expo)2010.
Now the abandoned project is being restarted, with a new engine that has a fast sonic,and other updates.
Download The demo from the link below.
UPDATE:There is now a new demo that includes 2 enemys. The link is below.