It was ambitious to make a 3D game in 3 hours, but you did it well.
I really liked the only-up gameplay that perfectly fits the theme.
There are only 2 things that would be nice to add or fix : - Mabye add different colors, signs, or hints, to know if the platform is normal, moving, or fast-falling - The player stay stuck vertically when it collides with the edge of a platform
Good game !