Wow I played this game for so long I have a lot to say about it but I'll try to keep my comment not too long.
First, I really had a lot of fun, everything feels very cohesive, it's an amazing game.
That said I think the game has a lot of potential with some improvements, and since there's so much going on, there's a lot of things that need improvement in my opinion: I didn't realize that you could build to climb until very far in the game, I focused on digging to get more diamongs and I didn't upgrade the bag, I didn't realize the diamond boxes respawned, that would have made my life so much easier.. I would also improve the movement since it feels very slow especially when you're building and have to go all the way down to collect more blocks. Because I didn't know you could climb, I didn't reach the robots at the top until very late, so I didn't know what some things did, I really think the game needs a tutorial because there's a lot happening and it took me a while to understand what to do even with the robot dialog explaining. The shop also needs to explain what every item does. Finally, I think there's a lot of games out there with this kind of style, from spelunky to steamworld dig and a lot of more games, so the climbing part kinda makes it differenciate from those, with more adjustments it could even make it into a full game that I would totally play.
Sorry for the long comment and having so much to improve doesn't mean it's bad, it means it has a lot of potential and I don't usually write so much about games so that just means how much I loved this one! Keep up the good work!