There is a repair item that should drop regularly and be common in the shop, I'll have to go through and make sure the drop rate works as expected. I recently reworked the drop system but may have missed something.
Thanks for letting me know!
Edit: Found the issue, consumables aren't dropping at all right now, this also includes armor drops which are vital for survival. It will be fixed for the next version. :)
As for sensitivity, the game currently is 1 to 1 with the windows cursor, but I'll see if maybe I can add some sensitivity options on top of that.
I'll work on adding some accessibility and customization options for the next update!