Good idea!
I consider to integrate this. Maybe I could introduce another collectible item called "drill" which enables you to remove one wall element by bouncing it. I think the drill must be consumed when being used. But analog to the nitros the player can collect many of them, allowing him to dig longer tunnels by investing the corresponding amount of drills.
Unfortunately I cannot implement it now since the deadline is over.
I will do the integration after the voting is accomplished.