Yes that will work! The goal is to be able to click on your game's page on itch.io, and play the game right on that page within the web browser, like any of the games on itch.io that have the tag "HTML5".
Viewing post in Crystal Cavern--Epic Mega Jam 2020 jam comments
Unfortunately I can't say if you will win. We have not yet played your game, as it is not available to play in the browser, as stated in the requirements. But we will judge the game once it is playable. Yes the prizes are real, for eligible games that meet the requirements and are exemplary candidates per the voting criteria. No offense taken :) We are looking forward to your submission!