example: Set GuyLook::speed

Author: Artur Ostręga

example/src/looks/guy_look.rb

@@ -2,6 +2,7 @@ class GuyLook < Yeah::SpriteLook #
 #class GuyLook < SpriteLook
   self.image = Yeah::Image['guy.png'] #
   self.size = 64, 64
+  self.speed = 15
 
   self.animations = {
     stand_up: 0,