Quick inbetween update! Performance! — Climbey Steam update #398446

I made the level loader combine the meshes in levels after loading, this makes high-density levels run a lot smoother. It doesn't combine in the level editor though because combining would mess with being able to move blocks so you'll need a beefy pc if you want to make highly intricate levels. "Don't fall down" for instance is still a little wonky on my 970 but should be good on 1060+. I figured this update was important enough to push before continuing my work on the new gamemode :)