This is a Super Mario World ROM hack done in the style of Super Mario Bros. 3, with some visuals and audio borrowed from other games. The story is similar to those found in other Mario games, with the princess being kidnapped by Bowser and taken to his island named Bowser's Valley, and it being up to Mario to rescue her.
Pbot has gone on a rampage thanks to Blockheads lack of mental processing. You must venture forth and rescue your comrades who have been thrown into corrupt versions of their own domain.