Day 30
Deleting, but cosmic. Drag files toward a black hole and space bends around them; they stretch thinner the closer they get. Cross the event horizon and they're gone — almost. For a few seconds, a glimmer of Hawking radiation lets you pull one back.
Eight files sit beside a black hole. Drag a file toward the hole, or focus one and press Delete to send it in. Space or Enter selects a file; arrow keys move between files; the Simulate slider below drags the selected file toward the hole without a pointer; Command or Control Z undoes within four seconds.