Added readme.md

Added keybind F9 for window mode
Player gets damage if he gets hit by enemy projectile

game.py

@@ -15,4 +15,4 @@ levels_list.append(first_level("First Level", (500,500), 10, 2))
 def loadlevels():
     for level in levels_list:
         print(level)
-    pass
+    pass