how do u find games made by others

Search for project keys submitted by others. Sometimes, here on miiverse, you will see people post codes for things they've developed. Once you have a code, go to the main menu, publish/download, and go from there. You can also visit SmileBasicSource.com. There's a library of games/resources you can use.

do you know any good game codes

did you not just hear what gale said?

This game was mainly made for creating programs, not for playing others programs. If you need any help, I could help with various things. For more help, goto www.Youtube.com/PetitProfesor3D