Usman Garuba was asked after his first G-League game what he needed to work on to get back on with the Houston Rockets. To paraphrase Garuba's response, he said nothing and that he feels he is already ready to play in the NBA. Instead, it's more about playing in games.
As you can see, Garuba has complete confidence in his game and in his abilities and views his time with the Vipers as a chance to get more experience. In only seven games, Garuba played sparingly, averaging a little over six minutes a game. The Rocket wanted to get Garuba more playing time, especially after the Daniel Theis signing.