It features 100 levels and the option to start the game from the new set of levels (beginning with level 51).

It features 3D graphics and has yet another set of levels.

Each set of levels (ranging from a bright, green grassy area to a deep red, desert level) has a deeply individual look and feel.

The tank is unlocked after you complete the last set of levels.

In this game each turtle has his own unique set of levels to complete.

Every new game features a different set of random-created levels.

Each Ed has his own set of levels to complete.

Each turtle has his own unique set of levels to complete.

The ported version, however, had a different set of levels and minor modifications to the game rules.

A shell is such a set of levels separated from the other ones by a wide empty gap.