I love a good word game! Thanks for making this! Couple of points:
* I got a couple of rounds with zero vowels, and a couple with 4-5 vowels that make for difficult words. In a game like Countdown, out of 9 letters there have to be at least 3 vowels and 4 consonants, so it might be nice to set some vowel and consonant minimums and randomize within those.
* It's harder to make quality words with fewer letters, so the first level is actually harder to make words in than the following levels with more letter options
* I switched to buttons for rotating the wheel pretty quickly because the crank takes a lot of movement to tick once. It seems like you went with 120 degrees per tick (on the first level, at least), which is two revolutions to fully rotate the wheel on the first level of 6 letters.
The presentation is nice, though! I appreciated the white on black bg aesthetic and the use of the fun font to tilt the letters around a little bit. Nice job!