The Cow and Bull Story is the original game that is now known as Wordle.
You start with having to guess a 3 letter word. If a letter is in the word and in the right place then it is a `bull`. A letter in the word but in the wrong place is a `cow`.
There are three 3 letter words that you must find to level up. Then it is 4 four letter words and 5 five letter and so on.
If you get to high levels and can't think of any words, then go to Options and tick the `Don't Validate Words` option.
Just for fun, and I'll be making changes so don't be surprised if it crashes or looks different. Use the contact form for feedback, suggestions and bug reports.
New words are chosen daily when the UTC clock turns midnight.
The words were taken from a publicly available list, which was US spellings. A US-UK List was then taken and used to convert some (but not all) of the words into British English spellings, but it's certain there will be US spellings in there. Also, any profanities might be in there and might be chosen - I haven't checked. Finally the words are chosen completely at random, so anything can turn up.
And note that abbreviations are also in the word list.