Can I create a demo game to embed in my website for free?

Hi! I’m a composer and I’m looking to create a very simple Unity game to showcase my sound design/composition skills to my potential clients. Do I need to purchase a professional license to do this? The game will solely be available for people to play around with on the site and there will be absolutely no way for me to make money from it directly.

The Unity licence agreement is pretty simple to read: Unity Software License Agreement 4.x

You only need a professional licence if your company earns more than $100,000 annually.