Shifting field gaps

Cards will shift to create gaps when a card is selected for placement
Played cards flip to face down
rules pdf included
scroll to hold up and put down card

for inspection
pick up features

pick up other card without having to put currently held card down
manually

can't pick up cards that are already in motion or face down
click on selected card to unselect it
table texture applied
Resolves challenge by returning context integer.