Well, two more things I found. Well, actually, two things I forgot to add: Time Attack actually works better than normal mode, and uses the same player selection method as the later protos. And by "works better", I mean it holds out without going bonkers for 10 more seconds. Sound Test is a barebones, and I do mean really barebones screen: The songs are there, in all their scratchy, beepy glory, even songs that aren't featured anywhere reachable. Some songs are pretty different from the final, like 000D. Some even have different percussion than the ones in the other Chaotix betas, like the almost unhearable 000F. Are 0011, 0018 and 0025 anywhere in any other betas or hidden in the final game? 0011 is a slower mix of the main theme, 0018 sounds like something out of a Megaman game, and 0025 sounds like a bad ending of sorts. 0015 is a different mix of a track in the final, and so are 0017, 0019, 001B, 001C, and 0021. 0026-0028 are empty, and afterwards begin the sound effects, which are basically the same throughout Chaotix's development. There are exceptions like 0047 or 004B, however. After 0069 there's nothing. It would seem like they composed the entire game's soundtrack before actually making most of the levels. Also, forgot to add that the menu is wildly different from all other Chaotixes, as shown by that first screen Drx released. In case you don't remember it, here it is: Note: All the musical differences are based on the regular, keyboard notes, not the percussion that was later removed. Strangely, most of the songs that aren't really featured in the levels don't have that beep from the EPROM hardware patching. EDIT: Probably a removed or yet to be implemented character.