In 2004 we had the pleasure of playing the rather enjoyable DÅkutsu Monogatari also known as Cave Story for the PC. A 2D platform adventure, developed over 5 years by Daisuke "Pixel" Amaya, featured action, a compelling story and gameplay, in which you play as a little guy in a cave on a quest to defeat the evil Doctor, who has world domination on his mind. It was a great and fun game that had multiple ports and even later had an enhanced version. So you'll be pleased to know that a fan developer by the name of howlermiller has done a Doukutsu Demake for the Pico-8, which is also playable in your browser!