Unlike commercial arcade sites, most repository-hosted games do not feature intrusive pop-up advertisements.
So, you found the .github.io link, but it's still blocked? Here is the technical issue: sometimes schools specifically block the github.io domain. Here are the advanced tricks to make it work: geometry dash unblocked github io work
In Chrome or Edge, the browser may ask “Allow [site] to use keyboard input?” . Without this, your up arrow/space bar jumps won’t register. Unlike commercial arcade sites
This happens on older Chromebooks. Switch browsers from Chrome to Firefox (if allowed) or reduce page zoom to 80%. you found the .github.io link
What does this mean for you the player?