Number 1 thing I notice (and this is nit picking) is where your face cam is located. So in your face cam you're looking to the bottom right corner, but the actual location of the face cam is the top right of the video. Meaning it kind of looks like you're looking off the edge of the video. So switch sides
Put it on the top left side so that it looks like you're looking at the game whilst playing it
Also you could probably play around with the cropping a little with the face cam so there isn't so much free space around you, this way it takes up less of the screen as well. The art around it however is nice!
Just with your channel as well, try and use one of the layouts where you've got the different tabs, this'll makes it easier to find all your videos! AND use playlists! Put your episodes for games in playlists so that it's easier for viewers to keep continuing on with the series etc.
Other than that, it's looking like a good start man! Keep it up