June 18, 2018:
Since the last update, I was working hard with code optimization. I changed the code almost for everything, and reduced the RAM usage to between 200 and 300. I also fully changed the code for conversation - the earlier way was too hard for myself to check thoroughly. Now, it is optimized together with everything else. Now, I can say, that the optimization is finished, and I can finally go back to checking rooms. I expect, that when I finish sanity tests, I can start actually play through the game, to find other bugs, not detected with first check.