Very engaging and fun for my group of students.
Even though my students are preschoolers, they still enjoy this game.
The levels are wonderfully created to be ever so slightly increasing with challenges as the game progresses. A few bigger challenges happen every now and then, but are done in a gentle way. The easier levels at the beginning prepare one for the levels near the end. If children did not start at the beginning, they would tend to get frustrated easier later in the game. Those children who started at the easier levels tended to get hooked by the game and would push through the higher challenges without as much frustration as those who started in the middle of the game. There is a built in mechanism, that if the child is doing a certain level and not making process, that the difficult parts will disappear, making the level easier.
Terrific2s about Busy Shapes