[WIP] Mine to the sky

[Codestar]

UPDATE


I've started working on a couple of background assets. Making pretty good progress overall. Really dreading the day that I'll need to replace that large Yoshi's island cave background. It's going to be quite the challenge.

As for code, I'm currently working on refactoring some of the core ImpactJS code to work with a new (and hopefully faster) inheritance library. I've got to squeeze out as much performance from the engine as I can because there is going to be a lot of entities on screen at any given time and I want this game to run FAST.