Emerging bad behavior

The recommendations already have been given by @Boban here My project doesn`t work, it's like 40 to 50 screens - #9 by Boban

many of your screens are identical mor or less

eg.
screen 11-14
screen 3, 15-18, 24, 26, 28-30
screen 19. 21, 25
screen 22, 23
screen 31

I have only one tip for you, reuse your screen's/components

And

For some recommendations see also Lansmana yeni çıkan kod kulesi - #4 by ABG and tip 1 here

General Tips and Tricks for App Inventor

Taifun