Yeah, people who I watched playtest it irl had trouble figuring it out too. The issue is that it's actually too precise. If the line enters the next grid while you hold down, it registers as a dash regardless of how long you've held it down, because that's how the game detects dashes.
The grid is the unit of measurement. A dot is one tile long, a dash is two tiles long, and you have to leave at least one tile of space in between letters. Hope this helps!
