fun for awhile
It was okay for awhile. If you do bad in the beginning, the rest of the game sucks. When i started over and knew better or what I was doing, it was very easy. I had all the upgrades before the first boss. Also even on your website there the final boss on lvl 45 just sat there shooting his beam in one spot. Made it very easy to beat him.
It was a good concept and graphics, but something needs to be done where if you screw up in the beginning, it doesnt screw you the whole way. Maybe get rid of the multiplier for money but keep it there for points.