Don't listen to Perry, pressing the space bar does nothing. Instead, click or tap to alternate between the old art (from sometime in 2015) and the new art (from March of this year)! Gotta say, I love this collab idea so much :D Always cool to see how far you've come as an artist! Even if you're not satisfied with your current work, looking back and seeing just how much you've improved over only five years is a real spring of inspiration! Imagine what you might be doing five years from NOW, mm...?