initial commit
Updated some comments
Added some game controls
Set up some more game controls
Made game pausable
Pause screen; gradients
Game options now take effect
Game stopping added
fixed stopping
minor adjustments
added starting countdown
added game clock
can choose game length
Add "About" section to README.md
Add general file comments
Added fourth player
Added preliminary score checking and game ending condition
Game Over text; Pausing doesn't mess up game time
Victory text
Update Player 4 color