Any4-1

This is essentially just a fullspeed Marbles level, although there are a lot of ways to make punishing mistakes. Learning this level carefully is important to succeed.

Optimal

After the initial spin-dash, do a full-height jump late out of the roll to land next to the frog and be in position to roll through it.
The jump onto the dragonfly at 0:15 is precise - if needed, slow down here to ensure you don't take damage and don't jump over.
A good beginner strat is to simply roll through all the Pips on the long ice platform following the midpoint.
When exiting the cannon, you can do a basic roll to regain maximum speed - A spin-dash isn't necessary.
It's fine to land on the second big ice platform and trigger it early. If you do, the top route over the 5 platforms is still easier. The platform will just be lower at the end and you will have to bounce on 2 dragonflies and glide a bit. The cannon through the E at the end is slower.
The platforms at the end are very difficult to "site read" and an exact route should be memorized. The route shown in the video hits platforms 1, 4, 7, 9 and 10, then rolls off 10 under the dragonfly and glides between the bees.

A 51 or better is good on this level.