At first I thought this game would make a wonderful education tool. Until I reached a level where two items - a dog and a ball - were perfectly balanced, and I had to choose one. I chose the ball, and was wrong. Apparently A dog can weigh as much as a ball, balance it on a see saw, and still be heavier.
Minor glitch: in the wizard's room after the frog on a log I landed in Both potions, thus froggie drowned AND was restored to human form. after clicking Try Again the fellow was standing on the wizard's corpse but would not respond.