Awesome
I loved this game, the only problems I had with it were that the first boss has too much health and the game starts to lag eventually (from shear number of enemies and effects). But those were minor issues, the game still entertained me for a long time.
Question though: Do the cash guns actually do any damage or do they just give you money when they hit? I couldn't tell from the gameplay really.
I got to over level 90 on stage one before the lag was too much for me to deal with and stopped.