Some issues.
The auto collect is way to slow, It's the main bottleneck in the game, especially for end game. It also just grabs coins at random. It would be better if it were funnel that scales until the entire bottom of the screen fully open. You have mole as a character and no hole in the game.
The balls were actually detrimental to game play once interest became involved. It was just better only to upgrade ball damage a little and nothing else regarding the balls until you basically had everything maxed out.
The loan mechanism feels like the wrong way to solve the problem of not having enough money to restart a bank.
Instead of breaking the bank. You should be able to assign the available slots a particular bank once a bank is bought. So I'd have to buy a bank 7 times to assign to all 7 slots.
The only time you can really even use the loan mechanism is early game so it's upgrades don't even make sense. Its also even more bottleneck since have to click for every loaned coin.
Overall think this is a good game, just needs some touch ups.