This is a really cool use of MV3D! I never considered making an arcade platformer.
I think the visuals, models, and cutscene camera angles were great. I think you should consider adding more camera options than the birds-eye view (side view and such). I feel I'd have an easier time platforming if I had more control over the pitch.
As well, I might play around with how the jump mechanic feels. It's tough to get used to and never quite feels comfortable sadly.
Still, this is a really good showing! I hope you keep working on it and I'm excited to see what your future projects look like.