This being the "appraisals" section I would value it at mid xx. It is a very ambiguos name. Yes it's pronouncable, but it conflicts with FAR too many similar spellings.....
kirl
curl
kurl
qurl
qirl
cirl
curl
kurl
qurl
This takes tremendous value away from it as "kirl" at least in English is not what people would type if hearing the word phonetically. SO to answer the rest of your questions.
It 'sounds' ok
Pronunciation not bad.
Not memorable. Conflicts with WAY too many different words and other possible spellings.
Don't feel it's suitable for a game or humour site.
I have a bunch of LLLL.coms in this category as well. Easy to say looking at it, but just conflicts alot with other letters. And that takes away from the name unless it can be branded as an acronym instead of a stand alone word.
Best of luck