Boost 2 is now available for free, thanks to the new Pocket Change Token system!
About Pocket Change:
Essentially, Pocket Change allows players to play the full game for free, for a limited number of times. Players can then purchase more tokens if they want to continue to play. As an added bonus, tokens are cross-game compatible: they will work with any other game that uses the Pocket Change system! Give it a try.
Boost 2 Trailer - YouTube