I guess sad smiley isn't very explanatory. It happens when there are either no consonants or no vowels selected. It's a dead simple algorithm that alternates between the two.

I should have it ensure at least one vowel or consonant is provided when clicking randomize, or give a popup.

Thanks for your feedback.

It often seems to put two vowels together, which works for "oo", but not reaylly for "yy" or "ii"

That's definitely unexpected. The only case I would expect is "yy" since 'y' is an option under both consonants and vowels.

I'll investigate. Thanks for pointing it out!

Could you enhance the character slider to allow a user specified "recipe"? Like a setting for the ratio of of vowels to consonants? That might reduce the occurance of 'yy' like results.

Pretty cool project - thanks for posting!

I certainly could. I'll add it to my backlog. Thanks for your feedback.