Very addincting and fun game.
Great improvements to the gameplay would be music, perhaps daily changing like the maps, and of course: more upgrades. It is an essential part of the game trying to outrun your opponent and to grab as many petals as possible on the way to improve your own Edmus. But once fully upgraded, this aspect falls apart. Perhaps you could just make more of them?
A second thought would be different leagues, in which you could participate, depending on the level of skill you gained, or perhaps by running a certain distance in a league to qualify for the next one.