Hey Pilna!
- We will check the stairs, we are still modeling the house so there is a lot of things to improve. We'll add your report to our to-do list.
- Yes, we know about the bug of flying objects, it is something that we plan to correct in the following versions, but for now we will leave because it is a funny bug!
Thank you for your reports Pilna, that means a lot of us and do not worry about your English, we do not speak well either hahah (we are Spanish).
Au revoir et merci!