Frogs hop and ribbet with delight when they get the right one. Keep eating fast, because there are hungry fish swimming around in the pond with the frogs, and these fish like to eat the frog tadpoles. The more bugs you eat, the more tadpoles you get. Eat a lot of bugs to stay ahead of the fish. This lets a tadpole turn into a new frog and you go up a level of play.
Game levels have different types of bugs, frogs and background images.
Change the kinds of bugs, how big they are and how many there are at any time. When you quit the application there is the option to save a study list to disk. It is possible to create a vocabulary lesson file to use instead of the built-in dictionary. You can only play level one until you register.