Try this, stuck pauses in and echo to verify:
cls
:console
title Command prompt
cls
set /p c=": "
echo %c%
pause
if "%c%"=="exit" goto end
if "%c%"=="register" goto reg
pause
:reg
title Register a new account
cls
echo Registration
echo.
set /p newName="Username: "
set /p newPass="Password: "
cls
echo Processing...
>nul timeout /t 3
goto console
:end