Yeah, when I need to inspect lots of images I just open the folder in gwenview.

For peeking at a single picture or two through you can hold down control and click/hover on the filename when using Konsole. Love that feature. You can even listen to .wav files this way.

If you need it precise and adjustable use 2 layers and concentrate them with the alignment tool.

Always thought of the noise channel giving the Gameboy a unique character among low bit rate music. Glad to see you make use of it (I like Thunderking arena for instance).