This is a really original idea & execution. The SFX are amazing, the art is nice and it was satisfying to play.
One issue is that you need to flesh it out to make it more challenging/interesting. The core gameplay loop is there, but it needs more stuff to make it solid. Perhaps turn it into a memory game after a certain amount of people, remove guidelines, add events, and whatnot. I understand if this is all that you could accomplish within the timeframe.
Also something minor but at the start I didn't get where I was supposed to click, so perhaps highlight it first (make it white, size up and down) then make it grey again.
Also I don't understand the difference between arcade and endless mode.
P.S: I swear I got a 100% once but I didn't manage to capture it :(