I liked the scale of the game, opening up the shop for the first time really showed off just how much y'all managed to get done in such a small time!
I managed to find a few mechs, and explored most of the nooks of the cave I could find. Unsure if there was another exit or something I didn't stumble into, even with a few shop upgrades.
I think the fast travel system would have been nice to be free to unlock. I missed the shop one at first and then was very confused why it didn't work after my first trip (when I had no more green gems).
Good job overall!