Farmer on a planet is cool (it kind of reminds me of another game I don't remember the name thought). In terms of mechanics, i did not understood if the time of day was purely visual or affected the action you could do. Actually sometimes, I had to click twice an on action to actually perform it.
Anyway, that's a good start, as said below, do not neglect sound effect and music. It's really important to set a mood (even if it's just a background drone plus mouth made sound effect)