This update contains a lot of new stuff, mainly in act 4, I originally wanted to wait with this update a little longer, until I'll have a more solid level design for act 4, but this update also contains some bug fixes, optimizations and previous acts updates, so I didn't want to delay it any further.
If you'll get to act 4, keep in mind it's very drafty.
Here are some of the new stuff in act 4
https://www.youtube.com/watch?v=jTXR69onBMsAnd a more updated spider boss
https://www.youtube.com/watch?v=OJn2iBzgBr0