My 4 year old loves this game and there is lots of room to grow!
We just got this game, but my 4 year old son, who is just learning addition loves this game. It captivates his attention and he loves how the frog eats the worm and how he can chose the color of the frog and the worm. I love how intuitive this is for my son. This is the first game he can do all by himself, he even knows which button is the settings button and can go in and change his arrow and colors by himself then start a game.
We are playing it in normal mode which is untimed and gives him plenty of time to count his fingers. We are playing it on the easiest setting, but letting the level increase by 1 every time. There is also an option to keep it on the same level.
For older kids the arcade mode is timed and you can pick which skills to add, we have not really tried anything else because addition is enough for us right now. I love that there is room to grow on this game :-)
samson d about Froggy Math