Just write them in a comment when they come to your mind, I write down everything you guys suggest me :)
Okay! I can only image how big the list is :D
Ps. I think that some kind of floor tile joiner sprite thingamajig would be very useful :D Maybe a few pixel width threshold made from various materials like wood, metal or just neutral colors
Hey Aidas, I've just added some floor connectors that should do the trick! I'm gonna add more stairs and some carpets tomorrow ;) here