I've just had the same thing happen again. The game will load, everything looks good then it just cuts off after about 10 seconds.
If this is a ban, I never used the score mod, never touched daily missions and only just finished level 20 in free play. I even stopped using the damage mod and mainly kept to God mode so I didn't have to keep repeating missions I've played endless times to keep getting back to where I was.
I think something happens when you unlock challenges because I'm sure it's at the same point every time that the game refuses to work.