If sprite graphics mean nothing to you then look at Ultimate's games. Its great graphics are the result of using sprites, and with this package you can and sprites of equal standard to your BASIC and machine code programs.
The package contains three programs: first, three demonstration routines showing just how attractive and effective well manipulated sprites can be. The second allows you to define your own sprites (up to full screen size with each character given its own attributes) and save them to tape. Section three explains how to use your creations, including a readymade collision checking routine essential for games.
Perhaps the most interesting and useful are the machine code routines enabling use of sprites.
For the initiated, this package will no doubt be well-received and well-used. However, not much thought is given to the novice. A small manual accompanying the game would have been helpful. My only other criticism is that the instructions on use were on-screen, and I had to laboriously copy them for reference while the computer was in use.