Played until the game stopped after winning level 45. It's a neat concept, personally the images flash by a little too fast. You might want to try adding a gallery option if you feel like extending the onscreen time of the images would make the game harder to concentrate on!
I like this feedback. The reason I don't have a gallery, and why the image flashes so fast is because the art used is horrible. So flashing quickly makes it so you don't realize how bad it is. I should improve the art, and also work on progression. I feel the game doesn't feel very fun to progress in.