I took a deep dive and found some in-game footage on a real cabinet. It looks like the towers are the correct colour in 0.149: https://youtu.be/JXX61Kp3CD4?t=687 so the magenta trench walls are likely correct (if rather zany!).
I also find the flyer to be intriguing, as the images look like photos from a real screen, yet contain elements that are not present in the final game (prototype perhaps?), including some sort of fire/ice gates in space and triangular barriers in the trench: