General tweaks and improvements. Sound and shiz. Also, a resource-intensive button.

There are things that could probably be done better, hence why I'm requesting this be pulled into the beta branch. I'm pretty sure it's stable, but wouldn't bet too much on that. Either way, there are things that could be improved upon
I modified the credits. Hope it's not too bad. I think it's an overall improvement, although some things should perhaps be a tad different.