There are more and more people with disabilities that would love to game and game competitively but maybe get discouraged because you don’t have the means to do certain things in the game because of physical limitations. I am a c5-c6 quadriplegic and love to game. I find the folks at Craig Hospital pretty knowledgeable about helping us out. Go here https://craighospital.org/services/assistive-technology/assistive-tech-lab-resources to find lots of options to be able to traverse many different devices. But go here for gaming resources > https://craighospital.org/services/assistive-technology/assistive-tech-gaming-resources.
I use a Kensington Expert Trackball found here>> https://www.kensington.com/p/products/control/trackballs/expert-mouse-wireless-trackball/ and I use a voice controlled program called VAC short for Voice Activated Commands found here >> http://dwvac.com/