diff --git a/pong.sh b/pong.sh
index 7cb49fb..441497c 100755
--- a/pong.sh
+++ b/pong.sh
@@ -1,8 +1,12 @@
 #!/bin/sh
 
-#STTY='-icanon -pendin -echo'
 make textpong
 if [ $? == 0 ]; then
-    stty -icanon -pendin -echo
-    ./textpong
+    if [[ $OSTYPE == darwin* ]] ; then
+        STTY='-icanon -pendin -echo' ./textpong
+    else
+        stty -icanon -echo
+        ./textpong
+        stty icanon echo
+    fi
 fi
diff --git a/textpong.c b/textpong.c
index 05a6369..f28b01f 100644
--- a/textpong.c
+++ b/textpong.c
@@ -43,7 +43,7 @@
                      1 <= (x - bar_x) && (x - bar_x) < 7)) vy = -vy;
             if (y == 20) score++;
         }
-        flag = 1 - flag;
+        flag = !flag;
         usleep(60000);
     }
     printf("\n**** GAME OVER ****\n");