The first one I think will get better ratings.

AFAIK there’s no ratings this time, so don’t sweat it too much.

Also, as someone who worked too much on the graphics and will barely have time for gameplay, I’d say a balance between both would be ideal.

If you’re game is fun to play graphics don’t matter. My games are pretty but boring, that’s not good either.

Graphics will get better ratings, however if you make a game playable in the web I really dont think people will mind how it looks, make it good, that’s all

Gameplay over graphics, you can’t appreciate good graphics when the gameplay is bad, but people can overlook bad graphics when the gameplay is worth it.