Wonderful
This is a very cool app for my little girl that just turned 4. The only thing I would change is in the matching game, no matter if you have tried a tile before or not, you get the "WRONG" type of male voice with a buzz (I know I can turn the buzz off). It shouldnt be so harsh if you havent tried the tile before. Also, try and make the "WRONG" voice a little more friendly. Im afraid my little Sophia will be scared when she hears it. She isnt used to such negative feedback! Those are the only two minor things I could see that could be improved. LOVE the difficulty levels.
I do like the other suggestions about adding numbers. lower/upper case letters would be good too, and more objects :)
Lostinkc about
I See Ewe - A Preschooler Word Game