I had a go
I have a Demo here MinerMoles
It was made in C3, but if you want it, I will re-do in C2.
Let me know if there's any bugs.
Left Click to make a block, Left click to destroy a block.
Destroy the Block that the Moles are on, and they will fall.
I took a more visual approach 18 events (shock / horror)
Cheers.