a speed based crib scoring thing

requirements:

• https://nim-lang.org
• https://github.com/ftsf/nico
• SDL2 and the other requirements for nico

todo:

• combo multiplier
  • consecutive correct scores raise your combo multiplier
  • muggins, aka missing points, resets the multiplier
• difficulties
  • easy - sorted cards
  • hard - unsorted cards
• splash screen/menu
• music/fx
• animated background