If correct, they gain more coins and move through 3 skill levels and 5 ranks within each level. This is a really basic program with few bells and whistles. The kind voice tells students if they've succeeded at each equation and encourages corrections. It is neither distracting nor helpful. There is no tutorial.
Students do get a game report at the end of each session, which they can print.
The program is pretty basic. Once each X is completed it changes colors from white to purple. Once aware of the treasure location, the student must purchase the correct tool to excavate it. This is the biggest problem. I would suspect it would get limited use from children beyond first grade, despite its ability to focus on grades 1-3.