i was going to mention this before, but i've been swamped at work. here's how I reproduce "Penguin!"

i have it on random shuffle. probably doesnt make any difference.

basically, just mash on Tweak Artist (#2), then after 5-10 times, mash on Cancel (Mark). you're gonna see the easter egg. dunno if theres an exact sequence of button presses, but this is how i can consistently do it