THE COLORS ARE IN THE WRONG ORDER AGAIN! This drove me nuts in the first game, and does here too. Seriously, in a game all about adjacent colors, why isn't purple between red and blue, and green between blue and yellow? My brain keep rebelling and mis-remembering the order.
OK, figured out why the color wheel was driving me nuts. Blue and purple need to swap spots; purple needs to be between blue and red, since it is a combo of the two, and green needs to be between blue and yellow for the same reason. Right now I keep mis-remembering the counter-color system because my brain keeps trying to put them in that order.
On the third level, ended up with the tile in the upper right corner with two gray block tiles flanking it, making it impossible to reach. Could not finish the level, even with just that tile and another left.