Full patch notes for all versions are available on the Trello roadmap: https://trello.com/b/XR4oQwYs/antistatic-roadmap

Major Features

• Netplay - play online with friends via invite codes. Lobby browser, quick play, etc coming later
• Main menu added, with beginning of a settings menu
• Control rebinding via console commands - rebinding coming to the Controls menu by v0.5.0

Other Stuff

• Grab mechanics have been revised significantly
• Throws now slow based on weight
• Lots of major balance, mechanics, and physics tuning
• Moved from OpenGL 4.3 to OpenGL 4.0, improving hardware compatibility
• New audio loader, which significantly improves music loading time
• Lots of improvements to the versus menu, though it's still a mess