Hey there! I wonder where you're getting this info from? There is no Chapter 4 in version 0.2, since 0.2 contains only Chapter 2 :D like 0.3 contains Chapter 3 and so forth. There is currently no 0.4, hence no Chapter 4. Current release is 0.3.3 which is Chapter 3 with bugfixes. I'm working on it, but it'll still take some time! Happy to hear that you like the twins! :) And also that you enjoyed the story so far!
Cheers!