I though about more feedback on money (currently it's just sound), but right now, for 3 day jam, I'm pretty happy with sound+flash as feedback for being hit.
As for the money line- not only it appears sometimes, but it gets longer the further you are in the game! It sort-of adds this risk-reward mechanic, where you need to make this quick decision about basically not dodging for a couple of seconds for massive points.
Anyway- glad you liked it!