You do some great work, sir!
There's so much good stuff going on here. Might I suggest reducing the need for some much grinding? I personally enjoy being able to fully upgrade a character's inventory without having to kill a small country's population. The digging element was a nice touch, but again, by the first 45 minutes, the premise begins to wear thin, and the repetition of the gameplay makes collecting resources a bit of a chore.
On the other hand, I really enjoyed the upgrade system, both in terms of equipment and character stats. Nice presentation, very tight controls, and overall an enjoyable experience. Thanks for the nice work!