Long term suggestion or maybe one for the sequel.
Multiplayer and player hosted dedicated servers/lan.

This game would be freaking amazing with MP and player hosted dedicated servers. Dysmantle would be a top-tier survival game with those two things.

Another suggestion which would lock into the multiplayer and dedicated servers as well:
A map editor. Players could host their own maps on their servers.

Another small suggestion: medals should have a tool tip, or something, that shows the goal for each tier of that medal.

For my attached image, I assume the goal was 5000 objects for gold, 2500 for silver and 1000 for bronze. Or maybe it was 6000 for gold, 4000 for silver and 2000 for bronze? I have no idea, so a tool tip will be very helpful in this situation.