The headaches were due to multiple factors: 1. Flicker. A 60hz scanout with no phosphor or LCDs to temporally smear the light out means a very raw image that's

The headaches were due to multiple factors: 1. Flicker. A 60hz scanout with no phosphor or LCDs to temporally smear the light out means a very raw image that's pretty hard on the eyes, which might be tolerable if... 2. Ergonomics were OK but they aren't. Needing to keep the thing on a table with your head hunched over peering into it is the opposite of comfortable. You can attach it to your head instead but then... 3. Simulation sickness becomes a problem. Fill peoples vision with a "virtual reality" without motion tracking and you'll start making people hurl. Interestingly, the best way to play Virtual Boy games is on a Quest VR headset. The controls are a close match, it allows the use of greyscale (and other colours) instead of red and most importantly the VB's output is displayed as a giant screen fixed in space in front of you. I played through all of VB Wario Land that way, it was great fun and very comfortable.