If I can't play games with it, it isn't worth $50. I'd pay $10 maybe $20 for it.
The mouse jumps all over the place, so I have no idea if games would work or not. Then the mouse leaves Remotix, causing the keyboard to not be grabbed anymore. Then he's running, and it's very difficult to stop the running.
I'd use Steam, but it doesn't work in macOS. The game never shows anything. Like it stops streaming.
Steam works now, you have to use Proton 4.2-9. See this issue. Probably doesn't work on Apple TV with the latest Proton either.