Toshi Omagari makes fonts. I caught wind of the Codelia release just recently:

Fortunately, Toshi allowed us to purchase a license to allow you to use it on CodePen! You’ll find those options in your Settings > Editor area.

Codelia

I think Codelia is awfully nice, but in chatting with Toshi, their favorite is actually Comic Code, another coding font they have created.

Comic Code

I was like: No way, surely Comic Code is to jokey and childish to actually code in. But I’ll tell ya, I’ve been using it for about a week now and I’m still finding it fun and perfectly usable.

Looks good eh? Toshi thinks so: