Anonymous Tipster released a new version of his game ThrottleX.

Release notes:

This is the second release of the ThrottleX buggy racing platformer. This version comes with five new levels (17-21), with the last two being particularly mean. There are also 4 clues spread throughout the whole game (which includes<16) which tell you how to unlock a secret hidden within the game.

http://forums.qj.net/showthread.php?t=32467