If there are only vowels left in the word, there is no way to then guess as you have to guess a consonant before being able to solve the level
Knowing which letters you had already used would be helpful as well
Yep, sadly we didn't get time to fix either of those :-)
We were able to fix the soft lock vowel problem! We'll add the letters thing later, because it's a new feature and not a hotfix (which would violate the jam rules).