It has the foundations of a neat game, but Runners is ruined by so much crap (bullshit level design that's often difficult to see coming, the F2P aspects, etc). And that's on top of the technical issues. I have had my runs ruined and invalidated by stuttering and fucking crashes. I'm on iOS, by the way, and generally, from my understanding, the mostly likely cause is that the game is exceeding its RAM budget. Good grief, Sonic Team, way to go back to your days of technical incompetence.