You'll have to load a new game to fix the video settings and fps cap.
Your gpu usage will drastically change in real time depending on where you are looking; at a clear sea or into a dense forest.
E isn't currently used to close menus as it's the main interact button. Only the other hotkeys that open menus can be used to close them respectively. ESC and TAB close everything though. I'll look into making E close menus that it opens also.
The stuck-in-ground issue was fixed 4 or 5 updates ago as was the raptor/peacock ai. I suspect that you still experienced it because you were using an old save.
It should get very dark at dusk and dawn, right before the moon and sun rise respectively. If that happens at other times, something is wrong.
I've heard that "rain on a tin roof" sound also. I plan to fix it and will soon. Thanks again for the feedback.