Nice work on this! I saw a lot of your development screenshots on Discord and I was super curious to see what this game was about.
The gameplay feels really solid, definitely has a lot of potential for further development. The goal of the game seems to be to dig as far out as possible and make as big a colony as you can, which is a really neat concept. I spent a lot of time exploring and finding these neat little structures. I'm not sure what they did, but they looked cool so I didn't really worry about that too much. Eventually I found myself hitting a point where I had so many resources that I couldn't dig fast enough to use them all up. That sort of defeated a lot of the point of growing more stuff, especially since as my colony grew, I'd be further away from my crops and would keep hitting unmovable tiles that would disrupt the pattern of my farm, which was kind of annoying and lead me to just stop planting more stuff. I also found digging became more tedious due to how slow it was later on when I had an excess of resources. Maybe upgrading your digging tool could also make digging faster on low tier tiles?
Overall, I found this game really fun. Nice work!