Also, as bad as the tape was as a medium, it could store quite a good amount of content. Without using specially compressing loaders you could have something like 30 games on a single tape.
Or saying it in other terms, the tape could contain many many times the memory size of the C64, so that multi-load games could be designed to a whole different size over the cartridge ones. If I remember well a tape device was produced for the Atari 2600 exactly to break the harsh memory limits and develop some more ambitious adventure games on it.
Of course the tape is a serial access device, so sometimes the game asked you to rewind it if it needed a previous segment of data. Or sometimes you could not read a tape properly, so that you had to adjust with a screwdriver the azimuth (the angle between the reading head and the tape). The best - not original - tape devices for the C64 had an optional audio output to help the user in this operation: you literally heard when the sound of the data was not right and it acted as a feedback to find the optimal azimuth.
The floppy disk really came as a blessing :)







