Hello, great game! I really have fun with it! But I have a few... more than a few suggestions. The game, as I said before, is really great but not very extensive. You have created a very solid and good form for the game. Now you just need to develop it! More cars and other vehicles, more races and more locations and SECRETES TO UNCOVER! Besides these basic and obvious suggestions, I have some interesting ideas for developing the game.
-> Add new islands and on them new challenges for the player.
-> You can make the minimap not be visible in its entirety only to a large extent from the player. This will allow you to create more secrets and secret locations!
-> Make tunnels, caves and cliffs! This will give you the opportunity to do interesting races.
-> Maybe it's a good idea to do a multiplayer mode but I know it's not that simple...
I haven't discovered the whole content of the game yet... SO I'M GOING TO HAVE FUN WITH YOUR AMAZING GAME!! If I will have more ideas I will write it:D
By the way, the car sometimes gets stuck in trees:)