This is so close to being a fun game, it's just wayyyy too easy. 9/10 times the picture to recreate is just a solid color, and then the AI fills in that color so it's an automatic win, and the rest of the time it's extremely simple to recreate the image. Also waiting for the timer to go down takes way too long, there should be a button to submit the painting when it's done.
It would be more fun if there were more complex images that used more than one or two colors, and maybe if the AI kept trying to ruin the picture as you're painting it so you have to fight against it, instead of just filling in one color at the start.
I really love the idea, it just needs to present more of a challenge to the player!