"The main window displays an animated section, a Reaction Editor and a textbox for instructions."

"On the top side of the main window you can choose a specific task to solve. The tasks are sorted from simple to hard."

"For the first task, you must make a rule to cause all the "a" atoms join, using the Reaction Editor."

"Another task you can complete easily - pair two types of atoms together using reactions."

"You can also use the Reaction Editor to make one type of atoms stick together."

"The users can play with the formulas to make all the atoms stop bouncing freely and join in a big cluster."

"By using the options menu, users can adjust the number of atoms, their speed and the height and width of the window."