Well, it works at least, but the controls are bad and the game in general is... blech.

you get a star for effort, but unfortunately the controls are much to clunky and choppy for a three year old to use without frustration (I'm 37 and it frustrated me) but the game isn't advanced enough for anyone older

Too simplistic. Only four puzzles to choose from, less than 20 pieces each? Maybe try adding difficulty levels, more shapes, etc. Something to keep player interest for more than 30 seconds.