Good graphics, and it's very satisfying to collect gems and unlock new skins, etc. Reminds me a bit of a downmarket Mario Kart.
However, why is the dragon so damn fragile? I thought I'd be playing as an apex predator, but one hit and I get a game-over screen. Extra lives, or having us lose time from a timer whenever we crash into things (giving us a bit of leeway), would be good.