The sesame street games all featured catchy tunes and generally good sound design which distinguished them from the stark sound tracks of most other Atari games. They also had unintuitive keystroke controls, and in order to clarify, they came with vinyl mats that you placed over the Atari's keyboard to help kids (and adults) figure out what button did what. These of course would get lost (and they'd get warped and not align correctly with the keyboard anyways) and so users would have to try pressing random keys. Big Bird's funhouse was the worst for having mystery keystrokes. Kids though still loved this peek-a-boo style game.