One could easily overlook the one stage in here as short depending on how it's played. I would still say it's still a bit too empty for my taste, lacking enemies and gimmicks used in creative ways;
However, playing as Mighty I could see that the level had different paths, and even one underwater made for him and Knuckles (perhaps?). His hammer drop and wall grip seem to work well as far as I can tell.
With that in mind, we can see that the level has different layers, and the most obvious path is shorter. There does seem to be a warp ring waiting for Mighty in the different path, but at what cost? Perhaps the idea of alternate paths could be experimented with more
With his abilities from Mania and Chaotix, it would seem that Mighty the Armadillo is the ultimate lifeform. Perhaps a good character for both new players and experienced players at the same time, having multiuse.
The intro screen is also very well done, should point that out.