in the level 2, there are those hamburger patty looking things that you need to get across. but they collapse under your feet. are there any tricks on getting across?

Well you could do either of the 2 things:

1. Quickly jump onto a patty and jump to the next the split instant you hop onto it so the patties don't fall down.

OR

2. Jump onto a patty and watch as they flash (this means they are going to fall) there should be one near you that doesn't flash so you jump onto that one and so on.

This part is the most annoying part of the game so be glad when you have passes it and good luck.