added tanks from sprig in personal repo

README.md

@@ -1,2 +1,20 @@
 # tanks
+The best way to show off your sprig to your friends!!
 
+This is a simple multiplayer game where you try to shoot down the enemy tank.
+
+Also available at:
+https://github.com/hackclub/sprig/blob/main/games/tanks.js
+
+In the color picker:
+AD to move player one cursor.
+JL to move player two cursor.
+W and I to set READY state for players.
+
+In the actual game:
+WASD for player one to move,
+IJKL for player two to move.
+
+The game moves the players automatically every 500 ms. 
+Each keypress shoots a projectile and changes direction.
+Shoot the other tank to win!