The suggestion is to add transparency to the menus i.e the menu on the left, top navigation bar and the blue backgrounds throughout the game.
This would optional to the player and could be switched back from the options.
Perhaps even adding a slider to determine the transparency for player preference?

I feel that it would provide the game with a more futuristic feel and would be perfect for a space theme

what will you have in the back ground of that transparent left menu or back ground? like what will u see behind them?

Whatever you have as your preset background. Like Milla for example.