Hi,
First there have to be a Amiga structured disk, for example drawers like "c", "s" where to put the files. You can create a startup-menu with just a textfile displyed where you see "button x to start program/game y". Then, you can re-map the keymap to start the specified program.
Or just start a menu from aminet, but that costs memory and sometimes, it has a limited number of entries.
NOTE: Don't forget to use "install" to make an bootable floppy disk!
gehtjanx