This is Super Mario USA! Just a modified version of Super Mario Bros. 2 so that it's called "Super Mario USA". It also uses prototype and Doki Doki Panic soundtracks. The only players you can play as is Mario. Z key to jump, X key will eventually be used to run.
THIS IS A PROTOTYPE DO NOT TALK ABOUT HOW BAD IT IS IN THE COMMENT SECTION THAT INCLUDES YOU @CRAFTING_ESER