This was a really fun and addictive game! I'm not certain that the score was resetting properly, though? Skipping an upgrade would reset it to 0, but otherwise the score wouldn't change between rounds. Occasionally if I was doing something as the timer ran out, that plot wouldn't reset between loops, and on one unfortunate occasion, I selected an upgrade without meaning to because my mouse button was down on exactly where the upgrade was when the loop ended.
Going hard into big carrot was a wildly successful strategy, and it's taking all my willpower to stop playing to find more broken combos and go to bed, haha!