I made it to level 5 and Rock immediately asked me if I wanted to go to rainbow run - which I did, of course - and so I said "Let's go now!" and before I got transported there I used a signpost to move to another road.
When I was finally transported to Rainbow Run, the coins showed up as usual and I collected away but when my 30 seconds were over, I was transported back to Rainbow Run with no coins!
Now when I go into the game, I'm in Rainbow Run with a countdown timer and nothing happens when the timer runs out. Stuck! HALP.