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You are right about the Minimum Requirements. The Steam page is asking for a lot better system than you actually need to play the game.
In the menus at the bottom the game always shows you what keys to press. You also have a key config menu where you can setup two alternative controls. There are only two places in the game where an Xbox controler is displayed. Also the one tip you just said was missed in localization.
Screen resolution is not capped at 1280x720. If you don't see higher resolutions the graphics device does not say that it supports higher resolutions. You could try to update your drivers or to manually enter any resolution you think your computer should support. You can find the config file at "[user]/My Documents/Saved Games/Zeit2/GameOptions.xml" and change the following two lines and save the file before starting the game again:
As you already wrote below the game supports 4:3,5:4,16:9 and 16:10 resolutions.
Thanks for the feedback and keep having fun playing Zeit²
Great interview... and as an indie developer I can just underline everything Rob said. See you in Las Vegas :-) don't think we will make it to GDC this year.