The ornamental design for a footballgameboard, as shown and described.
FIG. 1 is a plan view showing of my new design for a football game board;
FIG. 2 is a upper right perspective view thereof;
FIG. 3 is a second upper right perspective view showing an alternate configuration thereof; and,
FIG. 4 is a third perspective view showing an alternate configuration thereof.
The broken line showing of game board sides, goals posts, a player's hands, and indicia on the game board is included for the purpose of illustrating portions of the “article” and forms no part of the claimed design.