Might need to be a bit more specific? Are you talking about the open file window when you hit ‘Start’ on the title screen? If so, you need to select any audio file to actually begin. If you cancel it you’ll stay on the title screen.
Or, if you’re hitting ‘Start’ on the title screen and it’s loading something without the open file window then that’s definitely not supposed to happen.
Last thing I can think of that is happening is that Spectrum Valley is being loaded with something appended on the command-line, which boots the game in Quick Start mode; but in that case it will skip both the disclaimer and title screen without having to press space.