Source: Steam Community (opens in a new tab)
Here's the rundown
Teleporting
Zip around the arena while carefully navigating gaps in the horde to buy yourself time.

Primaries (Cursors)
Every cursor except Sword has been reworked.

Secondaries
4 New Secondaries.

Terminal Commands
Multiple commands have been overhauled, and all others have been significantly rebalanced.
New Enemies
Laser Cube - Fires a circling laser when the player gets too close.
FRENZY Cube - Unleashes a bullet frenzy when the player gets too close Upgraded cube - Standard cube, but better
New Bossfights
The OSIRIS bossfight has been completely redesigned to fit KWD's new gameplay.
OSIRIS will follow above the player's head, and his guardian cubes have been reworked.
Control Remapping
Much needed. Thank me later. :-i
Default terminal commands
Set your favorite command as the default for easy access.
Bugfixes, and balance changes.
I literally don't have a list.
It's currently 5:35 AM where I am, and I'd like to get some sleep tonight, so I hope you'll forgive me.
Just know that the gameplay should feel much more awesome-r.
I hope you enjoy it.