This is by far the most inventive interpretation I saw of the theme, wow. May I ask what you guys used to make this?
Love the arcade style and how all the mechanics support it, as well as needing to go back to the exit at the end. Meaning that you have to both dig to find good stuff as well as giving yourself options for the retreat.
If I had to give a suggestion it would be to maybe stun the player a bit if they try to hit a block that can't be broken, as to punish them for not paying attention.
I think you guys hit gold with this, and would definitely love to see it expanded in a bigger release. Congratulations!