"I can't seem to see all my system tray icon in the Glaze theme..."

I do appologise for this glitch. If look at a normal screenshot of the Glaze theme you will see there is a label beside the systray with "GLAZE" on it. The width of this label is caluculated by subtracting x position of where the systray starts from the x position of where the label starts. As icons are added and removed from the systray the label is resized. But if the systray has so many icons that it starts before the label then a negative number results and screws things up. My attempts to detect for negative numbers didn't work for some reason. My only suggestion is to remove some icons from your system tray or remove some elements of the theme so it's not so wide. I'm working on a new version of the theme now so if I can I will fix this problem.

"...the top part of the theme shows up in the game..."

I created a bang to hide the interface for when you are using full screen apps such as games. You either press Win+Alt+T to toggle the interface or Shift+left-click on the desktop and select "Show/Hide Interface". This is documented in the readme file with the theme. You will also see that I have provided a feature to hide the interface automatically when a particular application starts.