Outstanding work, especially for the time limit. Graphics are flawless, the music fits to the mood. In the way you explore on and on through this wilderness and you are looking forward to new encounters, it reminded me of the original Fallout. The mood was similar, too.
I quit because I didn't have the nerve to go back, find rocks, and waste most of those on enemies I pretty much fought before.
What fascinated me was that my game (Gale Axile) has nearly the same setting - a lone guy [probably] in a space suit exploring, picking up resources, building, trying to survive - yet everything is different. On the first glance, your graphics are much better ;) But also, yours is so emotional and easy to pick up, while mine is complex and heartless lol
To put it in a nutshell, your game is interesting and made me think. Outstanding.