I'm glad that you liked it :) Sorry about the crashes..
I don't think that you are dumb, I think that's on me. I did not stated clearly that you can use the scrambled letters multiple times in your word. Maybe that helps, try it out. :)
Based on the feedback I got so far, I think, I made a mistake by not mentioning explicitly in the tutorial that you can use a letter multiple times. Try it out!