[BATCH] Door in RPG

@echo off
SET key=0

:door
echo Open the door?[y/n]
SET /P answer=
if %answer%==y goto doorlocked
if %answer%==n goto door
if %answer%==use goto checkkey
if %answer%==find goto key
goto door

:doorlocked
if "%key%"=="1" goto dooropen
echo The door is locked... You need a key...
pause
goto door

:checkkey
if "%key%"=="1" goto dooropen
goto doorlocked

:dooropen
echo You opened the door! Want to continue?[y/n]
SET /P answer=
if %answer%==y goto corridor
if %answer%==n goto lose
goto dooropen


:key
echo You found a key!
SET key=1
pause
goto door