Put the camera between the two players

One single camera for two players.

Game.gd

@@ -0,0 +1,13 @@
+extends Node2D
+
+var cam
+var p1
+var p2
+
+func _ready():
+	cam = $Grid/Camera1
+	p1 = $Grid/Player1
+	p2 = $Grid/Player2
+
+func _process(d):
+	cam.position = 0.5 * (p1.position + p2.position)