The graphics are really cool ! The lined paper and scribble effect is really well done, but i just had an issue with some of the colors for the paint splats. Some of them could be a bit more saturated or lighter to be more pleasing together, but it just comes down to personnal taste so i'm not going to lower my rating for that.
I'll test it a bit later with a friend to test the board rotation, and i'll do my ratings then, but as for now, the solo experience was already pretty fun ! :-)