It’s way easier to move from one Linux distro to another if Valve starts enshittifying SteamOS (which would really suck) than it is to move from Windows to Linux. Either way this is a good stepping stone that’s well supported.

These are the candidates? They look like clones.

A Head in the Polls

You’re out.

Think Different Freely.

When you install Windows, you don’t really control your computer. Microsoft does.

Also, if you’re making something similar to Smash Bros, remember to keep the movesets/combos relatively simple. Too many complicated combos will make it harder to pick up and will be harder to balance.

Potential names:

• FOSS Fighters
• Open Tournament
• Libre Brawl (Or some combination of these)

I think is best to start with common archetypes (think DnD classes) and make movesets that feel right within those stereotypes. That should make a good starting point and you can tweak from there.