Hey! Thank you for your answer, and thank you for your time!
I check the system requirements, and on first look i cant see anything be wrong with my pc model performances: e.g. i use Chrome and Win7 for now. There might be issue with a graphic card (it is from 5 years ago), but if someone else have this same "sprite-line" problem, it could be on something else, but if it is only me and my pc, it should be on my issues only. I cant export the on the mobile devices while i do not have the; on the other hand i would be able to open saved project on the mobile devices browser.
I can't use the family behavior either for now; is just come up with the performance errors and other issues on using the program so i don't want to subscribe the license for now. There are just always something going wrong and can't figure out what is it
(origin points, plugins and/or behaviors compatibility on each other, performance problems; or even sold assets are good but expensive, or cheap and unready) so i start the new project all again.
I share again the pictures: i have not either idea should i do use 1080p or 720p on project's preset; or even 4k, and how does it matter if i have just 1 rotating circle sprite and it still is laggy.
I don't know either about the cpu, and why on the letter box sized game it is faster and CPU is over 80%, and on full screen CPU is less than 40% and all performance slower and laggy.
So the question is; does anyone meet up with these problems on their works, and where is the help page (Scirra's or the others) or the problem solving solution's.