We've been listening to your feedback and have been working hard to make more improvements to the game.
We found a couple of weird bugs that were preventing some achievements from 'sticking' and we found some minor things that might help with performance in tiny ways.
We wanted to get these changes out to you ASAP even though their impact is pretty small.
Hopefully this improves your gameplay a little bit and we will keep working on more ways to improve the performance overall.