I've fixed some bugs, added one achievement and few more things.

Added:

• Footstep sounds
• Achievement - Too Dirty (Win game without mining any dirt)
• Gold glitter effect
• Improved cave generation
• Improved achievement notifications

Adjustments:

• Buffed Dynamite
• Drill cost decreased

Bugfixes:

• Reset Achievements button no longer resets volume
• Dynamite explosion sound bug fixed