Catwalk Caper is a ROM hack made by saxamuhphumpet for the Music Themed Level Competition, in which it placed 37th. It is listed as having four Stars to collect, but two of them actually share the same ID, meaning it is not possible to obtain four Stars. Due to a number of modelling issues, this hack can be deceptively difficult as Mario is prone to getting stuck on the level geometry and needing a reset to become unstuck, or being left with questionable jumps due to model scaling.
Stars[]
Three of the Stars can be obtained in the upper level, which takes place on a series of catwalks above the audience's seats. There is a red coin Star, a 100 coin Star, and a Big Bully to defeat up here. The final Star, which presumably shares its ID with one of the aforementioned Stars, can be accessed by jumping into the warp pipe at the back of the audience's seats.