Next reward at 500K? With card prices already through the roof, this was the one thing you actually did for us that you didn't have to. Now that we have made you more successful than you anticipated, you cut back on that too? Do you have day jobs at J.P. Morgan? WTF?
The ridiculous cost of anything worthwhile in this game is crazy. If you would simply charge a fraction of what you are currently, I'd gladly spend a lot more money.
I'm running into a bug on 39 - if you use pushback more than once on the bosses (usually 3-4 times) they just keep moving back until off screen, making the level unbeatable. No one left to kill, level isn't over.
You might want to invest in FlashDevelop, FDT, or FlashBuilder if you haven't already. You need to run a profiler on this thing - it's got a TON of memory leaks that can be easily found and remedied. I noticed it really starts to lag when you are shopping and you add/remove a lot of items. I'm guessing those items aren't ever being garbage collected, along with a ton of other stuff. Sucks to see a game this detailed get released in this condition.
You'll be happy to know that we've halved all game currency prices by as much as 50%.