Very neat. Making the screenshot animated might give an even better idea of how it works and make the page a little more dynamic/involving. Do you have any plans to have it analyze the trace(s) and give the user suggestions on what to change?

Very cool. Did you do all of the coding and heavy lifting on this app yourself? It certainly raises the bar in this area! Hopefully it didn't weigh you down whilst developing it.

Sorry, today is clearly Pun Day.

You've used all of the puns :c