Thanks for pointing this out! It's important to always make sure that if you are making a commercial game, any assets you use (including fonts) are properly licensed for that purpose. I updated the link for Roboto to ensure it uses the direct Google Fonts link. To the best of my knowledge, both of these fonts are allowed for commercial use in games. However, it's always a good idea to download the relevant license and verify it for your project to be safe :)