I have recently started to develop a streaming channel for my YouTube channel (self-promo not intended) and I was wondering how I could make a game for the Roku. I don't know what game engine is best to make a game, and what the Roku could handle.
Whatever development environment you are using to create a video streaming channel on Roku. VS code, Eclipse... This is more of a framework for building a game. There are no full game engine/editor packages like Unity or Unreal for Roku and you will need to roll your own setup for developing on Roku. Roku is not as capable of most modern devices when it comes to making games so it is best to manage expectations on what you would like to accomplish. Check out the games section on the Roku channel store to see what others have done. Here is one of my games