I made it seem to be a game machine more. That is, there is no login . Booting from a CD-ROM, a game just starts without a login screen. Because Linux is a kind of UNIX, you may think it is necessary to do login, but in fact, we can get rid of login if we set it well. Don't worry about it.
Data are to be saved into a floppy disk .
However, there are a few attentions. In case of a PC unlike a consumer game console, it is impossible to specify the hardware configuration like a video card or a sound card. Because we set up the X Window System and the sound card in accordance with an own PC and fix it into a CD-ROM, the game may not completely work with the other PC that is not similar to the own PC in its hardware configuration. However, even if considering only the own PC, it is very attractive that a game can be played by just booting from a CD-ROM anytime without being concerned with the contents of a hard drive. Then I explain how to make this CD-ROM game system.