I was wondering if anyone had any tips or tricks on how to get the power ups in Prospect Park 2. For some reason I'm having such a hard time getting the height I need to get the power ups.

I usually go with a vertical web (up+X) right after the second to last tree, get all the way up and then swing to the left two times. Just don't keep pushing up on the d-pad once you swing, 'cause it'll make you fall down.

I keep doing that but for some reason I always end up under the power ups and never get them, why is it so hard?

I think I finally figured it out, its as you said, but you it's super important to complete the swing, you have to initiate the second swing at the every end of the first one and don't do it too soon or you end up low.