itch.io

Not officially, I did see some people making ports but as for myself I didn't tackle how to make it android compatible. I promise that on the final release (after chapter 4) I'll make a mobile version.

Hmm, I guess not really. I do sometimes post some news on my twitter but it's mostly about when the new version is out. Perhaps I should start a proper devlog.

Honestly if we had too much time, adding an option to choose which sibling is the Avatar would be dope but it would make things too complex.
Although... assuming you're looking for some yuri, it might happen later down the line. 

You can always check game files to see if you've missed anything as all the pictures used are there. But just so you know, no there are no scenes with the characters you've mentioned, at least not yet :p