This is such a cool way to use morse, I love it. It took a while to understand exactly what you had to do, but once it clicked it felt really cool tinkering with it. I'd love for more variety in the sounds since there were a lot of repeated letters, and it would be fun with something a bit more stressful near the end with rapidfire letters.
The github link leads to 404. Remember to set your repo to public to take part of the challenge.