Interesting game, but gameplay is frustrating. The 'falling dice wreck a hole' thing doesn't contribute anything to the game and only makes it more frustrating. Even if the wrecking hole mechanism is not removed, the cost for fixing holes should stay constant, instead of increasing over uses.
Exploding sixes is the main cause of falling dices, and secondary exploding dices flying out of control is devastating. The upgrade 'extra dice' will cause the game to lose more easily, and therefore is actually a downgrade. It should be reversed, and will become a powerful upgrade, by limiting the destruction caused by exploding six.