The MUI User Interface with colorful image buttons at top drawing area in the middle, buttonbar menu on the side, and statusbar at bottom may be used for a future Paint Program, or Icon Editor or Web browser. So you should get accustomed to seeing it. ;-)
The Amiga version of RayStorm could use a small update with some colorful buttons at top, buttonbar menu like Lightwave and the existing two-tone navigation buttons below the buttonbar.
I'll do a before and after screenshot of both. aROS will need an updated user interface and I would have to integrate the new buttons with the existing program anyhow. Why not fine tune it on Amiga? Besides the images for the colorful buttons on the Toolbar at top are 32 color ILBM images with 5 bitplanes. That's perfect for 68k.