All right, it's been a while since I've updated this topic. For "real-time" news you should follow me on Twitter. I also post weekly updates on my blog.
Anyways, I'll post a few screenshots of everything that I've been working on since late august.
Among a lot of other things, I added spinning blades to the winter levels, and made a bunch of awesome and dangerous levels with them.
I've also been working on a desert environment. These desert environment will be set inside a huge pyramid that has been taken over by the enemy forces. The desert levels feature all sorts of moving and spinning platforms, and dangerous lava!
A few weeks ago I finished off the prison environment with new laser traps and polished missile launchers.
There we go! For more in-detail descriptions I recommend checking out the development blog I linked at the top of the post.
I planned to show a lot more, but I had to remove a bunch of images because apparently posts have an image-limit. Again, check my blog or Twitter for more stuff.