I'd quite like to make some changes, allow to choose words from different languages for example. But I think the most important would probably be to improve the user experience of the main interaction in this game: Entering and checking a lettter. Another thing that is bugging me is that the SVG does not work on most phones. There should be a fallback if SVG cannot be displayed.
Anyway, it works reasonably well on a desktop environment - including local storage which means you can close and open the browser and pick up from where you left the game. The list of words is at a sub-teen child's level at the moment, and my children actually like playing it! So here's the little Hangman game.