You will have to purchase the game in order to enjoy all its features and tile sets. The demo version listed on the official website only gives you a glimpse of the program's functionality and features.
Features for the game:
60 game layouts (3 in demo version)
6 original tilesets (1 in demo version)
changable tileset size
unlimited undo and redo
tiles reshuffling
viewing game solution
favourites and recent layouts lists
layouts editor
You can buy the software using the following link: http://lenagames.com/dtaipei.htm
