Candy Box 2, an online ASCII game by Aniwey (2013). Rewards inactivity!
Candy Box 2 is built in HTML 5 and has a number of nice features, like “save slots.” The game’s source code is released free under the GNU General Public License GPLv6 and there’s a wiki and FAQ. The game is created in typescript (javascript), along with HTML and CSS. Give the game a try here. -LT