A simple 2D game for PC

A simple 2D game for PC involving user-defined icons running around the computer screen. The game should ask the user how many icons can exist at a given time and adjust their positions at various locations within the screen. It should also be able to play custom voice or music every now and then. May require random number generation. The code or design file should be made available, along with the instructions on how to modify basic items. If you are interested, more details can be provided.