To beat this level, just follow the path on the side you are on, and catch when necessary. It is also possible to beat this level without catching. Use the Skater's long jump to reach new platforms, and plan ahead.
Overall, this level is not too hard, if you have a route planned out.
To get the bonus, jump onto the platform in the top right, then continue to the next standing platform. Catch onto the left, then jump on top of the next platform. Catch onto the right on platform on the left, then onto the right of the next platform. The bonus is located there. Jump to finish the level.