Nothing really smashing about this. It's just a simple drawing game... But ponified.
Don't get me wrong, I love my little pony, but you could literally have more possibilities using paint on window 95 than what you can do in this game.
You could add... I know! Transparent lines that you must draw over and you're rated for the precision of your drawing (if you draw too much out of lines, then rarity could find this ugly)
There could be already drawn picture but you must colours them without going over the black lines or, colouring them with the right colours ; for example, you have a Rainbow Dash drawn on the paper and you must choose the right colours and then, rarity get to say her opinion depending of your score.