A number of minor improvements to the demo.

• Fixes problem where it was hard to tell if a snowcrab is holding an orb while walking left
• Fixes issue with final snowcrab puzzle Fixes problem where undo/redo could cause snowcrabs to double-trigger the elevator a single time, changing its direction unexpectedly
• Makes colors fully customizable, improvements to all menu UI
• Adds a UI for replaying old puzzles (esc -> load checkpoint now lets you visually pick a checkpoint)
• Added new hub world graphics, added new town hall, decorated biome areas to match their biomes
• Added new hub world animations to call attention to gates and portals that have been unlocked
• Added new portal graphics
• Added butterflies to forest
• Added butterfly tutorial for first puzzle
• Added undo redo tutorial
• Removed halo toggle
• Fixes visual problem with the new default controller glyphs from Steam
• Adds new color change spinner graphics and animations Cleaned up dialogue transition to the second biome, dialogue can now happen in the hub world, branching
• behind the scenes as needed
• Busy wait instead of sleep if below min stable frame time
• Some mild optimizations (stats not calcualted unless requested, some matrix math optimized)
• Improves the undo system debounce
• Flashes player brightness to call attention to color changes
• Fixes flash on game start up, especially in big picture mode
• More work on puzzles that aren't included in the demo
• More narrative work that isn't included in the demo