Cool idea and concept. Though I feel like there is no punishment for collecting money early. And the fact that you need to pay for power ups is weird. Its entirely possible to just play without power ups due to low cash. I didn't even notice that you needed to pay for them in the first place. There was no error message or any feedback. Maybe if you had to meet a minimum cash before a certain level, then maybe players would have more incentive in getting more cash. Or you can have a reverse gate, where it grows, but the payout decreases. Overall cool concept and definitely can be improved upon.