This is the extended version with a sandbox mode. Really, this paid version is like a kickstarter. If you enjoyed the free version, Id look forward to making more chapters with more varied mechanics. If I can get 7000 downloads, youre guaranteed at least a Chapter 2. And right now, the game is 50% off! So only $0.50! And if the game picks up more, all future additions and updates will be added to this version for free.