Gamedev.js Jam 2021, the second edition after the successful Jam in 2020, is hosted on Itch.io again. It started April 13th, but you still have time to join and create a web game up until April 26th.
This year though there are two optional categories: Web Monetization and Decentralized, and a whole bunch of cool prizes: from software licenses, through cash, crypto coins, to hardware devices - all worth a total of $20 000.
Theme for this year is: Mirror - good luck and have fun!