The level just doesn't... work. I can give some slack to abusing SMW level design tactics because the physics are top-notch, but SMBX is greasier than Las Vegas. Tight corridors, jerky events, physics glitches (which always result in death), annoying thing piled upon thing piled upon thing. Even the opening powerup is near impossible to get.
I like the ideas here, but the insta-kill lava and glitchy physics engine render this unplayable.