1541? Get off my lawn.
When I were a lad, we used to load up games off audio tapes. If you were lucky, you'd have a tape deck with a counter on it, so you could fast forward or rewind the tape to the right place so that you could load the game you wanted. And it would then take about 15 minutes to load the game. The border of the screen would generally have rainbow striped patterns flashing all over it all the while, apparently something to do with how it loaded data from the tapes.
Sometimes, it'd take so long to load the game that the game makers would put in a little mini "loader" game for you to play while you wait for the actual game to finish loading in the background. Or, they'd have a tune for you to listen to (Ocean was famous for doing this - the "Ocean Loader", with music written by Martin Galway). That's right - Commodore 64 had multitasking and multimedia, 8-bit style.
And if your game failed to load, you'd have to turn it off and on again, rewind the tape to the right place, and try loading it again. With your fingers crossed harder, this time.