40k is nothing to sneeze at and thanks much to everyone who has splashed some cash at the project! It's REALLY great to see this on track to being funded in such a short time!
Regarding the modest budget, yeah, the higher you set your goal, the lower your chances are of success. We based our goal of $65k on 2 factors:
1) How much we'd need to finish the game at an absolute minimum level.
2) The amount of funding similar projects achieved in the post-DoubleFine Kickstarter boom. The two most similar projects we could find were Quest for Infamy and Jack Houston. Both of those both fell within the $60k - $70k range (not taking into account the latter's $10k pledge that fell through).
My fingers are crossed that we can breach the $100k mark, as then we'll start knocking the really cool stretch goals off the list! That, and the more we receive, the easier it's going to make the game with a minimal amount of stress! But either way, any funding amount is going to help out a hell of a lot and will put us in a much better position than we were in before the Kickstarter.
To answer your two questions, gamecreator:
1) The native resolution without any filters is 640x480. I will be investigating a wide-screen resolution version for smartphones and tablets (and, more than likely, PCs) if we hit the $120k stretch goal.
2) We have a very nice update coming soon that should fulfill your wallpaper request. Keep an eye out for it!