575,582c575,590
< $UP_KEY) playerDY=-1
< playerDX=0;;
< $DOWN_KEY) playerDY=1
< playerDX=0;;
< $LEFT_KEY) playerDX=-1
< playerDY=0;;
< $RIGHT_KEY) playerDX=1
< playerDY=0;;
---
> $UP_KEY) if [ $playerDY != 1 ]; then
> playerDY=-1
> playerDX=0
> fi;;
> $DOWN_KEY) if [ $playerDY != -1 ]; then
> playerDY=1
> playerDX=0
> fi;;
> $LEFT_KEY) if [ $playerDX != 1 ]; then
> playerDX=-1
> playerDY=0
> fi;;
> $RIGHT_KEY) if [ $playerDX != -1 ]; then
> playerDX=1
> playerDY=0
> fi;;