diff --git a/src/playerinterface.cpp b/src/playerinterface.cpp
index ff5c26a..fe4a5f4 100755
--- a/src/playerinterface.cpp
+++ b/src/playerinterface.cpp
@@ -134,6 +134,14 @@ namespace snakeplusplus
             if ((event.type == sf::Event::Closed)
                     || (sf::Keyboard::isKeyPressed(sf::Keyboard::Escape)))
                 gameWindow.close();
+            if (sf::Keyboard::isKeyPressed(sf::Keyboard::Equal)) { 
+                if (delay > sf::milliseconds(16)) { continue; }
+                delay += sf::milliseconds(1);
+            }
+            if (sf::Keyboard::isKeyPressed(sf::Keyboard::Hyphen)) { 
+                if (delay == sf::milliseconds(0)) { continue; }
+                delay -= sf::milliseconds(1);
+            }
         }
     }