The two hotkeys I've most wished for while playing this:
1) Set spawn quantity of the current meat unit to the remaining units required for the previous unit's next Twins upgrade.
2) Store the remaining number of previous meat units required for the currently selected spawn quantity (minus what you already have), switch to the previous meat unit, and input that number as your custom spawn quantity.
Just those two, in combination, would save soooo much clicking, typing, and short-term memorization.
Adding to GPS, I think a "time for purchase to pay for itself" readout might be useful -- the price of an additional minion in the selected category divided by the GPS that minion would bring in.
Flash is doing 300% even with music and effects turned off. It seems to stop when I scroll down the screen or change tabs -- the processor goes VROOM when any of the game area is visible. I'm running the latest Chrome on the latest Ubuntu, if that helps.
Glitch on level 15. He split into two when I had him go down, then the top one vanished and now the bottom (only) one won't climb the latter when I click it. Since there's no way to restart the level, this leaves me basically screwed.
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Added more performance fixes. Crossing fingers.