Where do you find uncopylocked Roblox games to learn from?

Roblox's own sample places are worth opening too, the racing and platformer ones. They're built to be read, with comments, which most uncopylocked games aren't.

The templates in Studio are a good start and they're made by Roblox, so the code is clean. For actual games, search "uncopylocked" on the site and look for an Edit in Studio option on the game page. Be careful with random ones though. Some carry hidden backdoor scripts, so check anything that uses require() before you copy it into your own game.