We're super excited to announce a massive new update that introduces a whole new game dynamic that completely changes how you play sand:box... playable characters!

Now you can design levels that you can actually play, allowing you to interact with everything and even play multi-player. We plan to add more objects to use fairly soon, but we rushed this out early so you have something to play for Christmas, enjoy!
~smellymoo


Update summary:

• players - 2 human controllable characters. Should work with controllers or keyboard.
  
• vehicles - can drive them around, and lean to control your weight distribution.
  
• carry items - you can drive a motorbike, carry a jetpack and a weapon.
  
• doors - powered sliding doors that can also be used as elevators.
  
• switches - players can toggle switches, letting you open doors or control electronics.
  
• climbing - you can climb edges or up some plants or wires. wood / tin can be used to make ladders.
  
• sound synth - make retro music for your circuits, great for making retro consoles.
  
• ROM writer - easy way to change ROMs in game, so you can use them as memory.
  
• data wires - unlocking incredible computing power, link ROMs together and send everything through logic gates.
  
• mirrors - redirect laser pulses.