Uncheck "Run in windowed mode" in the Launcher settings page and see if the result satisfies you. If you step into some problems with it, for example black stripes on the screen sides and such try this:
MXL launcher → Settings → Uncheck "play in windowed mode" → open "⚙️ Glide Settings" → 'Settings' tab → Turn off 'window-mode' → Set 'static size' to 'no' → Check the 'desktopresolution' box → Uncheck the 'keep aspect ratio' box → Quit and close the Launcher → re-open it and then launch the game.