This is good.

I like it, it has a decent feel to it, and is quite able to be mastered. The soundtrack is alright. But, the sound effects, for the jets, sound like my old modem >:-(. I think the checkpoints are great, but perhaps they should appear before you miss them... I see no place specific "celebration". Most racing games will show that you had made first, second, or last place, etc. It would be nice, perhaps a plot too...
I may seem critical, but I really like this game. I would hope to see multiplayer options as well..