Done, ng, ng.

Done

start

ding

done

Difficulty score 10. No green.

dng

go

done

It has a skew unique rectangle.

...which is like a bent unique rectangle, except it is all in one row of blocks.

DING. Well, it was respectably interesting. The skew unique rectangle was probably not needed, but interesting. Nothing hard. I'll give it a 14.

Wow, this is a click-fest

No brain cells were harmed in the solving of this puzzle; nor were any even mildly inconvenienced.

go

whee!