Overhauled glitch system

I completely changed the glitch system, previously, you could glitch through any objects by dashing into it. This is no longer the case, as it would cause many, many, many problems down the line. 

So, allow me to explain the new glitch system. 

You now can only cause a glitch in dedicated "glitch spots", you can see what those look like in the image. In some cases, there will be messages hidden within the glitch, for example, the glitch in the wall will periodically say the word "dash", indicating that the way through is to dash through it. The key appears semi-periodically within the glitch on the right as well.

Other things fixed/added in this update:

-fixed fireball duping

-added dash animation (does not work in scrolling sections yet)

-removed post-vortex fight