Compiles and doesn't *immediately* blow up...
It works!
Basic antigravity fields work
Robustified field loading so it returns Nil when field isn't defined
Robust against counterclockwise polygons by simply reversing the points
Vortex works again
Fixed layering properly
OverUnder.sg works
Really pretty antigravity!
Clean up of sparkle code
Sparkles pre-populate, but still kinda slow for huge maps
sparkles uses a mutable array, not noticeably faster
Tweak/fix rendering
Moved levels into separate folder
wip