Starfield Wallpaper (0.6.3 Alpha)

This update adds a new block: Stars Wallpaper.  This is a dark-background block with a random assortment of pixel-art stars, colored to match the various stellar classes for real-world stars, as seen from outside the atmosphere, so they're more yellow-orange than you might be expecting.

This update was just something fun for me to work on over the past month while I was overly busy painting the house (that sucked up most of the time I normally work on this game and sadly, probably will for the rest of summer and early fall).

Here's a screenshot of this wallpaper in action, as a background to some transparent replacement blocks.