I love digging! This was really cool, the digging controls were really satisfying, the gfx/audio are great, and it was really cool that the palettes would in-between fade to indicate different sub-levels.
I ended up with 8 treasures at area 2, I couldn't find the last 2 needed for the dig upgrade even after tearing the place apart. I think maybe some additional help/hinting for Skill Issue cases would go a long way. :)