Brinstar is a starter stage. It has a central platform and 2 smaller platforms on either side of the stage, as well as a top one. This would make a good tourney stage, but attacking the things supporting the side platforms causes them to slant downwards and rendering them fairly useless. You can also attack a certain section of the main platform (lots of circular things), and hitting it enough times causes the stage to sperate. Also, acid occasionally rises up, causing minor damage to anyone who touches it and causing the bottom pit to be filled. The lava has 4 levels: way below the main platform, slightly below the main platform, above the main platform, and above the side platforms. The top platform is always safe.