Don't worry about your english. I am French and it is google that allows me to translate my responses to comments.
For the breathing movements, I applied in css3 an animation on the x and y axis of the Div containing the images and cut scene of the game.
Here is a simplified version of the process :
I modeled the house in blender. But not the whole house. Only the parts I needed. I had started drawing plans to be sure of the dimensions. The parts were modeled in different blender projects to avoid it being too heavy. But you can find an image where I tried to nest all the rooms in one by clicking on this link: https://jedb.itch.io/invitationem/devlog/323230/extra-stuff-if-you-wont-
If you have any other questions in the future, please don't hesitate to ask me :-)
Hi retrocoal :-D
The game on itch.io is currently in 1000px / 750px.
Which means the visuals are at this resolution. These are not larger visuals that I would then scale down to CSS.
My game is in 4:3 for the old school look.
I don't think there is a perfect resolution. I made this choice for reasons of faster loading and display. But there are surely ways to manage the memories of his game that I do not know.