Cosmetal's been on the MB for just over a year now, and the Bomb Dive Update is here!
Cosmetal now has a bomb dive, inspired by Soap The Hedge's bomb dive move. To use it, press spin while hovering to get a tiny vertical boost and then slam into the floor to fire laser shots, and if you are Super or Hyper, you get an upgraded bomb dive.
Most of Cosmetal's afterimage effects (such as dashmode) have been replaced with Genesis-styled ones. If you don't like them, you can switch them back to the more modern effects with the menu.
One music track, Cosmetal's victory theme, has been replaced by the Sonic Triple Trouble 16-Bit one, and the boss and Fang themes have as well. You can switch these tunes all at once from the menu as well.
On the technical side of things, Cosmetal's variable system has been updated. So if you want to check for the jet boost being active, you can use player.cms.jetboost.active instead of player.rboosting.