Hi Michal,
Had a few moments between rain showers that stopped my work outdoors, so I took a quick look and made a quick test...if you want "space" to count as a mistake in the situation you describe, in MooTyper version 3.1.4 you can comment out lines 151 and 152 of the typer.js file.
The same change will work in other versions of MooTyper, but the line numbers may vary slightly.