The friendly neighborhood web-slinger makes his way into the world of Plug & Plays.
"Streets of the City" Level Select#
At the main menu screen, press Up, Up, Down, Down, Left, Right.
(Source: Plug & Play TV Games Wiki)
Test Menu#
At either the JAKKS Pacific or main menu screens, press Up, Down, Left, Right, Left, Right, Down.
(Source: tikal.)