Thanks for the feedback!

I agree,  a palette would be very useful.

By "color picker" do you mean something like an eye-dropper tool, where you'd click on a rectangle to sample/select that color?

I wanted to add both palette & eye-dropper, but didn't quite have the time. Since there are ratings for this jam, I feel weird making an update while that's still ongoing, but adding an eyedropper would be super-simple; maybe I can add that after the ratings process is over.