I love this game.
Only problem is in rush mode- if you mess up once, it's not possible to even make it to the second gate, because you won't have the time, due to each gate only adding 30 seconds, and each gate being about 28 seconds apart. So if you wreck twice, you lose about 3 seconds, leaving you only 27 seconds. Since it takes 28 to reach the gate, it's a foregone conclusion that you'll lose. ANYWAYS
ON TO MY LITTLE REQUEST
Add little bubbles or coins or towers or whatever that you can run into and collect for more time, kinda like coins in sonic, or item boxes in mariokart. It'd make it MUCH more enjoyable to play rush mode. It'll also contrast nicely. A somewhat forgiving rush mode, and then classic one-and-done.