In terms of both gameplay and design, I think your tower is pretty subpar. There are multiple instances where jumps are spammed, notably the outside section. The gameplay can be somewhat inconsistent at times, with jumps varying from around hard to all the way to peak intense. This jump in particular should definitely be nerfed:
As for the design, there isn’t really anything that catches my eyes other than the ring surrounding the tower frame and the symmetrical pillar design surrounding the winpad. The first floor feels empty, so you should definitely add more gameplay there. Some parts of the tower are very dark, which can affect the tower’s enjoyability for some people. Turn off cast shadow wherever it isn’t needed. Since you’re going for a classic design, the tower is passable in terms of authenticity.
There isn’t any creative gimmick throughout and the entire tower feels pretty generic as a result. Try theming the tower’s gameplay, as @Domphie suggested.
I can tell that you put effort into your tower but the gameplay is still a bit lacking