a simple premise, but works well to fulfill it!
I did notice that money drops every time you press a key, maybe it should only do so if pressing the key does something? Like right now pressing jump mid air spends money, despite not doing anything.
I think a way to make this more interesting would have been to spend money to "toggle" the directions? Like pressing left would push the object left, and you'd have to press again to stop going left. Also, it would allow interesting puzzle designs, where the player would need to anticipate which direction to toggle in advance to reach the end with as little actions as possible!
Anyways, good job on this fun little idea!