Can't control computer with phone

Having issues controlling computer with my phone. using a samsung galaxy s8. and windows 10 on my computer. Installed from playstore on phone. I open TV on my computer and phone put name and password into my phone. It opens the screen and loads for a while where my mouse isnt showing or anything. Finally once my mouse pops up I can't do anything. Can't click anything at all. Basically just a frozen screen. Turned off udp and the issue still occurs. Haven't changed any settings. What am I doing wrong?

Ok got it to work. it wasn't connecting properly at first. now just having issues clicking in the game I'm playing. Is there a way to change mouse settings on TV android?