Hey Innes, thanks for taking the time to feedback. Much Appreciated!
In terms of the looks, I feel it's a bit mish mash, I think the background and ground look out of place. So maybe tonight I'll address that and attempt a drawing :-)
In terms of the player sticking to the top, I've seen that as well but never been able to replicate it, it either happens or doesn't, now that I know someone else has experienced it, I'll try and track down the cause.
In terms of re-starting the level again, what about loosing coins or being slowed down instead?