I've now further increased, to one and a half seconds, the time your finger has to be held down on a letter to signal you want to submit the word. This should surely eliminate most cases of inadvertent word submission caused by a long press. However, it doesn't rule out the risk of inadvertent word submission due to an accidental double tap. But perhaps such a problem will be less likely now because there's no need to jab a letter sharply - the player can tap a letter slowly and deliberately and, as long as they lift their finger before 1.5 sec has passed, all will be well.
Let's know how this works out, Roddles and others with similar issues.
Pat, I think I've also fixed the problems of the puzzle shrinking in Chrome. Give it a try.