I can't properly rate the game as I find myself unable to play it.... I'm erring on the low side of a 'neutral' 2.5.
Playing of Firefox on a PC I can't find the 'how to play' section at all. It just immediately opens with 144CDF and the colour boxes. I figured how to change the numbers, and switch the 1, 10, 100 part but, as I said, I can't find any instructions that you've implied are there and would be super handy.
(I can't find the issue brought up in the comments yet, but I might be missing something. Sorry, if not.)