Hi,
I like this game a lot. It is quite complex for such a "small" game, to me, it actually feels more like a "big" board game rather than a card game. Also, you did a great job with the background music!
My input on your questions:
1) I do scroll up and down during the game quite a lot. Seeing the goals top-right would be great, but only if it doesn't make things too crowded or too small to decipher.
2) I definitely prefer the suspense with scoring on the end.
3) + 4) I have hardly changed the views so far, so no opinion...
5) Sometimes it takes a few attempts to make the double-click work, but I have no idea why that is! I play on a desktop browser (with a mouse).
6) I don't use a mobile or tablet.
7) Strong vote for fixed positions!! Not only for the scoring table, please also for the card layouts.
Thank you for offering this great game!