Very nice game! :)
Like others I also enjoyed my ride on the top lane after I figured that was the easiest one. I like the ideas of adding active data only on certain lanes so you're required to switch. Also a drop down (move on lane down) button would be nice.
I was missing the music in Firefox so I played it again in Chrome and there it worked nicely... But then I started missing sound effects for when I was riding the lane with the right color.