Yesterday I was giving a math test to my 7th graders and discovered The I of It. I solved the whole thing in about 1 hour. Loved it! It's cute, delightful and sometimes quite challenging. One element that I particularly liked is the fact that you must use the arrow buttons on your keyboard. So much fun! I don't know if the program will save your game mid stream. I was afraid it wouldn't, so I kept playing.