It looks really cool. Have you considered making a turn-based game instead of time? I don't know how sensible that would be, but something like 10 moves and 5 pickaxe digs per day. Personally, I don't like being pressed for time in games :D
Speeding and powering up your tools and extending your campaign time are important parts of the game mechanics here. I have created turn based games in the past (Shallow Domains / Roguebot) and I will surely create more in the future. It is good to know that people like this genre.
