This is an overhead shooter game based on an old shareware Multimedia Fusion game named Ballmaster2 and it's named because you're always sliding, and all you can do is boost towards a new direction or shoot in a direction. There's SNES mouse support if you use real hardware and an adapter or use the latest Nintendulator. Player 2 can join in to help out and there's a simple level editor.
The plot is that you're an Oxiclean detergent ball and the Big City Slider was stolen and it's being used by an evil Billy Mays to make Big City Slider enemies.
It was written for the second NES compo where a very incomplete version took 5th place.
Download (with source, assembles with ca65)