A cute and fun game! Great sound and audio effects, with decent mechanics that bring it all together. The main issue I ran into was that it was a bit challenging to move around and try to climb out of the holes again in time.
Loosing the entire pouch of coins if you didn't make it out in time felt a bit harsh and led to me simply not adventuring too far out, or sitting at the top for the last 20 seconds instead of trying to grab a few more nuggets. I know they weren't destroyed, but finding the pouch in the next level was a bit of a challenge too since it just falls down. (not that I disagree with loosing the pouch, but perhaps an indicator or something else to help soften the blow)
Perhaps some kind of purchasable ladder or rope to climb could serve a good way to aid extra movement?
Overall a great game though - I had a fun time playing!