У вашего броузера проблема в совместимости с HTML5
In this video, i'm using the mouse and keyboard of PC to play the game. Mouse and keyboard of PC are shared to DroidMote Server via LAN with the tool KMRedirect. The phone is connected via usb-c to HDMI cable to an hdmi capture card. Anyway the HDMI of Galaxy S8+ is not very good it suffer a noticeable lag, that was caused from the samsung dex implementation. Seems that the phone when connected to HDMI suffer a lot, is not like all others android hdmi devices that i tested.
Create the Touch Profile for the screen of your phone , load it in DroidMote Client settings, enable Gamepad2Touch.
Touch Profile for Controller on Phone and for Hardware Controller :
http://www.videomap.it/touch-profile/download.php?id=com.tencent.ig
Game Download:
https://play.google.com/store/apps/details?id=com.tencent.ig