Of the other 3 games, Recoil is the most noticable. It reminds me of Dropzone (A8 game). Instead, the player is attached at the ceiling; other mechanics like the little overview map at the bottom of the screen and building horizontal speed and exiting the map left/right to reiterate the map are the same.

I didnt quite figure out the mechanics of the game; but it involves shooting lots of fastmoving things that can be identified on the minimap.

The other 2 games, Invaders and Bridge-it are not really that interesting. Invaders is a vertical shooter, but similar to SPace

Invaders, the screen does not scroll. The invaders shoot a boatload of bullets, and move in weird patterns.

Bridge It is a little 2 player puzzlegame where both parties have to bridge an area. The first player to bridge the area wins. Afaik, no CPU player.