Wow thats bad. Looks like some fat **** sat on it, At least the peanuts inside probably stopped the internals coming loose and floating around,
As to how to get the screen out, I'm sorry, I don't know, But take some pictures and start stripping the layer off, I'm sure it will be come clear, It may be screwed from the other side and you may have to remove some housing or cover first to get to the fixings.