Glad you like them :)
-In general I add a gallery when the game is done but I understand that it can be frustrating, I'm working on the redo of Serena room and it's somethinkg that I can keep in mind to create before the final version.
-I don't see the point to be expose in steam since I prefer that the game stay free.
- For the the save file it's inherant to Tyranobuilder if I change a variable the save on a previous update is not working .it's why I create shortcut to new content for every update.