I'll stake my reputation on recommending
Cubed Rally Redline, which is on sale for free at the moment.
It starts off deceptively simple and somewhat slow, but once you've unlocked a faster car it turns into an awesome twitch reflex score attack game.
You can only attempt one mission at a time, of increasing difficulty, which are mainly divided into:
-Collecting coins (you only bank coins once you've survived a lap)
-Reaching a set score (you can only score by collecting a drift icon in corners and not switching lanes while you string together a combo. Gas cans increase your speed and risk of crashing but also increase your drift multiplier.)
-Reaching a distance (collect gas canisters to keep going and avoid obstacles for as long as possible at increasing speed).
All three of these present a different way of approaching a race. A race which will end within a few minutes and left me wondering where the time went after a long stretch of "just one more race...".
There's also an awesome Matrix-like emergency break mechanic that slows time to aid you in weaving through difficult sections of the track. It's so satisfying once you get the hang of this and manage to survive a difficult stretch. Don't neglect this!
So yeah, grab it and tell me how right or wrong I am!