I have a lot of spare time at the moment and I'm thinking about a new project to add to my portfolio.
I'm exploring the Canvas and WebGL APIs. I'll probably do something with it and add WebSockets for multiplayer functionality.
I was looking at Phaser3 yesterday and I was surprised how easy it was to get started.
So I'm working on an app that will allow for automatic printing and delivery of pictures from mobile devices:
http://www.printstream.net/
You can add pictures to your PrintStream account and it will choose a certain number each month to print and deliver to you. We also are thinking about an even more automatic method, where the app will algorithmically choose from all of your photos each month without having to explicitly add them to your PrintStream account. This is definitely a feature my mother would want, but we want this to be opt-in to protect the privacy of the users.
I'm still prototyping the app using React Native but I'm excited to get it up and running.