Round two: two full designs, side by side, and a short form on what you'd rather use. Five to ten minutes, no key needed to look, and the link Ryan sent you carries the key that lets your answers save.
Round two: pick a designTwo complete mockups plus a short reaction form. Five to ten minutes.Round one, for reference: seven ways it could work, drawn as grey sketches so the question was how it works rather than how it looks.
I play in the groupFour screens per version, phone first. About fifteen minutes. I run gamesSix screens per version, the GM's side. Twenty to thirty minutes.No account is needed. Nothing is stored except what you type, under the name you give.