When submited my game i had put the sounds on the title screen and when the player press the buttons, but it seems that when i build for web the sounds didn't work, but the PC version works correctly, maybe it's my version of Unity (for this project i used 2019) but i did a test with 2021 version and it seems to work.
Thank you very much for the tip, and for having give this special attention to this detail!
I really appreciate it!