I made a game similar to yours, it uses a AI model in order to parse user input. I have the same problem as you, when the game is launched from itch.io game page in a mobile phone, the virtual keyboard covers the input area. I was not able to fix it and it seems that you are in the same situation, but how you deal adding the warning message at the begging of your itch.io game page when the users access to that page from a mobile?