Starting today, Project Spark, Microsoft's quirky game creation game, is no longer for sale. And come August 12th, the servers will be shut down, Thomas Gratz of developer Team Dakota writes. As a consolation, anyone who bought the retail version "starter kit" will get a credit to their Microsoft account. If you redeemed the code inside after October 5th of last year (when the game went free-to-play) and prior to today, you'll get a credit to use in the Xbox or Windows stores. Gratz says that the credits will be automatically applied for eligible customers.