Thanks for the excellent application! I just had a small suggestion. I noticed that, on the Windows 10 UWP Viewer app, the media keys (play/pause, volume up and down, fast forward... etc.) on the client machine do not work, even though keyboard input is enabled: they don't control the host machine's media. (In fact, they do nothing). I would love it if they did, and this seems like an easy feature to implement, hence my little suggestion here 🙂
While you're at it, you could send secondary mouse buttons as well (Mouse X1 and X2)!