I had a really fun time playing this! I got to 1.3 million and found it difficult to easily make more money so I blew all the money on upgrades then accidentally closed the game a while later! Just wondering, how does the high score get saved? In the next game I played my score was only 87,000 so I didn't know if I was supposed to submit it in-game or something.
I played the windows version and the mouse wheel didn't seem to work for zooming but +/- did work (though I wished it would have zoomed out more). For a jam game I think this was pretty great and was scoped pretty well, but if you ever decide to add more, I think it would be cool to see occasional deals in the shops where some resources could be on-sale to make you feel like you were getting a deal (rather than set prices).
I think the music was great and the overall experience definitely made me feel like I was a lonely nomad cruising space. I agree that K.A.R.E.N. was kind of annoying, but honestly, the game would have been super lonely without her :)