I got about as far as you did my first run; I played a couple more times and got to 32 twice. I don't actually know how good my monitor is here though, or if the one on my laptop is better. (It's a Mac, so maybe? Apple is supposed to be better at graphics than Windows.)
I did it again and got a 25. I used Chrome instead of Firefox that time, but I don't know if that makes any difference or if I just got lucky in the color choices.
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