I mean yeah, I want to know the principles and concepts of a basic beat em side scroller. Im already learning a little through the learning xna 3.0 book and the book doesn't exactly specialize in 2.5d sidescrollers. I have a basic thing saying that its y value can't decrease from 400 so it looks like it can only move within the bottom part of the whole screen. I'm pretty sure the video tutorials have something different since mine doesn't take into account collisions in 2.5d. So is it worth it?? I don't really have an income so 35 is a lot.