Thanks for your replies! I do know, that it is too big for old computers with 800×600 resolution. Nevertheless it looks ok on 1024×768 and more (resolution almost for any monitor sold in at least last 5 or six years), so I believe it normal for our target auditory.
AdventureDad, how have you counted size of this page? As far as I tested it this page is 227857 bytes. Take a look at https://www.websiteoptimization.com/services/analyze/wso.php?url=https://www.funkybird.ru/
I do know that this page is quite big and rich with graphics, so I plan to optimize my CSS and images…