This was really great. I also ran into the issue of a button behind another button and I thought the game froze so I had restarted. But I knew what I was doing then so it was a bit easier. Overall I really enjoyed this. I think this has potential to be even bigger. Maybe adding different items you can source or upgrade. Expanding rows and columns for upgrades, etc, etc. Overall I really enjoyed this. Well done and fits the theme great!