PUBG-like games mouse mapping e.g. Knives Out on Remix OS

[Michael Lee]

I would like to see if I can get some help on my Knives Out keymapping here.
In my case, I have the newest version of Tincore Keymapper installed from Google Play on Remix OS version 2016112201, which is of the newest that can be found on internet. I tried to use it on Knives Out, which is a popular PUBG-like game. However, after the mapping, I found that the game does not respond to my left-clicking or right-clicking which is supposed to click on the fire button as assigned. Also, no matter which touch area options I used (all 4 of them), the screen still does not seems to respond to cursor movement. Particually, the crosshair does move around, but it will require me to wait for a while statically before moving my cursor so the hollow blue circle refering to the cursor position becomes a filled one which I believes is meaning the screen is being touched. However, despite this knowledge, such a delay before I can move my crosshair is still unacceptable for the gaming experience.
I would like to appreciate if anyobe can provide any advice regarding the touch area crosshair problem, or can provide me with successful experience on keymapping of those pubg like games like Knives Out, Rules of Survival or Free Fire.
P.S. I have accidentally found that Knives Out have native keyboard mapping that can interact with certain actions, and I would suggest that these mappings are from the PC version of this game because they are identical.