Check the in-game changelog for details!

But heres a screenshot...

I was going to update the maps this release to make them all more interesting. But i decided against that, they are more inetresting, theres way more going on, but i didnt change the wall layouts (I plan to for next release, now that most of the engine work is wrapped up, and add my levers, bars you can open walls you can blow up to  reveal secrets etc.)