Thank you! Yes you're right about the background color, I think its exacerbated by the fact that if you fall of the edge it doesnt "kill" or reset you in any way, the game could do with more of a fail state because at the moment the only penalty is taking longer to complete it.
Thanks! Yes in hindsight i wish i had made the map bigger and more of a track rather than just a little arena, because i don't think it would have taken very long and it would have given the game a bit more purpose.