You should definitely check out JohnEarnest/RodgerTheGreat's iKe, built on his open source k interpreter in JS. Fun examples: http://johnearnest.github.io/ok/ike/ike.html?gist=bbab46d613... and http://johnearnest.github.io/ok/ike/ike.html?gist=b741444d04...
https://github.com/JohnEarnest/ok/tree/gh-pages/ike
https://github.com/JohnEarnest/ok
And related APL/J/K subreddit: https://www.reddit.com/r/apljk/