My eyes do hurt a bit after playing this, but its totally worth it!

coolest game and it also helps with vision. you can see your score and thing "do i need to go to the eye doctor?" and therefor will help many, many people with vision problems.

this is a VERY interesting idea, not much to it, but there doesn't really need to be for what it is. I would personally add a mode where it didn't flash, though i'm assuming you might have tried that and found it was too difficult, but i feel like the flashing made it feel a bit too easy and separates the player from the illusion, and not having any flashing would make the player have to sort out this illusion more intensely, and it would get deeper into the player's head.

First game for me which utilizes perceptive illusions. You can even train peripheral vision with it ;)

I like this concept. You should do more of these kinds of things.