The visuals and juice on this one was incredible. I didn't understand the game at first, and thought it was just about mashing keys, and I was having fun doing only that. I was surprised to see that there was actually something to do, and eventually sorta got the hang of it. I like the constraint where one icon can get reused, and apply to slightly different situations. I'm not sure if the sounds/keys were randomly generated, but I had to press a searchglass key over and over again, and it made the sound I wanted to hear least :D
Really strong style, seems like it could go right onto steam as a dirt cheap game, with just a little more content
Here's a playtest!