-all new fx system for weapon hits and items pickups.
-modifications to alternate attack
-new more powerful charge attack for primary weapon.
-new downward attack for primary weapon.
-new jump through platform system (drop down requires pressing down plus a button tap).
-shield bat knife projectile no longer travels through ground collisions.
-secondary weapon will now break pots and other misc objects.
-new secondary projectile weapon.
-A LOT of optimizations, should prevent a lot of stutter and lag issues.
1503 update!
Source: Steam Community (opens in a new tab)