There is nothing wrong with how this game plays, it’s perfectly done in every respect. However, on a phone screen the tile icons are just too small, some of them I can’t tell which animals are on the tile because they are so tiny.
To the developer, I suggest making the board bigger for phones. There is enough blank space around the board to do this. Making the board (and thus tiles) bigger would make this app playable on a phone. Right now, it’s too small, so I deleted it.
So my recommendation is, if you have an iPad, this app is perfect. If you’re thinking of playing on your phone, however, it will be too small and you’ll need a magnifying glass. Good game otherwise, though, and good price.