Super Freaks 1 Ultimate Edition will be getting a supercharged update soon!
Turbo Mode is a crazy new way to play the game. Your movement speed is much faster, but to compensate, any and all health mechanics are replaced with a timer that gradually ticks down. If it lowers to zero (or you die at all), it's an immediate game over. You're gonna have to make really good use of your newfound speed if you wanna survive! ...you should be careful too. In particular, you'll probably notice your max speed in the Uncle Swordsman Story is now crazy fast in Turbo Mode, so you're gonna have to watch it and make sure you don't get cocky and die like I did.
It'll be a little bit before version 3.1 drops with Turbo Mode, since I need to go through and balance it properly and see if it plays well with Hard/Fast Forward and etc. In addition, as a nice bonus, you have a TINY speed increase in Normal Mode as well, so the game should feel a bit less sluggish in spots overall.