Update gameplay feedback and repair portable VR launchers

CHECK-SETUP.cmd

@@ -3,7 +3,10 @@ setlocal
 cd /d "%~dp0"
 if not exist ".venv\Scripts\python.exe" (
     echo Run SETUP.cmd first. This check does not install or launch anything.
+    call tools\show_launcher_error.cmd
     exit /b 1
 )
-".venv\Scripts\python.exe" tools\setup_environment.py --check %*
-exit /b
+".venv\Scripts\python.exe" -u tools\setup_environment.py --check %*
+set "FTLVR_EXIT=%errorlevel%"
+if not "%FTLVR_EXIT%"=="0" call tools\show_launcher_error.cmd
+exit /b %FTLVR_EXIT%