> Would it be a whole lot of fun to complete the game in one guess?
I would say yes. It would feel great, like you are outsmarting the game. Kind of like when you discover a good build in an RPG that helps you get ahead - even though it's often intended by the designer, you feel like you pulled a fast one on the game and it feels awesome.
Isn't the goal to get the final answer? I think it should be allowed. Similar to not using all the available attempts at wordle or finding a secret passage to the end in a videogame.
If you look at it instead like a 1D version of a crossword puzzle, then it's not skipping to the end so much as just filling out one of the other words.
I see it as a UI limitation that you can't fill it in (how would you show it?). But it's fine as is, I'll just use it to help me solve the adjacent ones.