Implement an anti-bot system where the system will detect a non-stop activity.
30-minutes random time after a non-stop activity, there will be a captch appear.
The captcha will appear at the top-right of randomly on the screen.
The captcha will be the size not big enough to cover the screen. Maybe around 1/8 the size of the screen.
The captcha will allow the user to do game activity for 10-minutes before disabling interactions.
After answering the captcha, small rewards will be given.
If the captcha is not answered for 1-hour after the 10-minute mark, bot suspection will be considered.