From LibreGameWiki:

Amazing! Anyway to go fullscreen or capture the mouse cursor in LBreakoutHD?

Pretty fun game. Anyway to remap the start race key from Enter to something like left-click or another key?

Looks like src files in the repo have been there for two years, but maybe the LICENSE update is the news?
Here’s their post on Steam: https://store.steampowered.com/news/app/2370310/view/519711143023870664

Alright dude, enough with the “Let’s Play” spam. Please post other content.
This isn’t FOSS gaming related.