Well guys! That's all a game you got there! When I saw the trailer on my friend's facebook wall, I didn't knew that it was going to be that fun! I often play racing game, but that one is just amazing! You got almost everything to make a good game inside here! you got flying mode, turbo, stunt, ghost and a lot of maps! Graphics are really great, and music is WOW! I can't wait until the OST come out xD These are the only things that I would add, maybe some Turbo Floor, some powerup (like infinite turbo and flying, slow the time or even take some seconds back from the clock (extra points?)), I would add a multiplayer mode, and finally, a customisable car (the colour (Boost or car color) or some parts that you would unlock with achievments(like hood for the back))
Well, I really enjoy playing that game! Please continue to make game like this one, ill stay tunned.