Super cool, and more impressive than what I did! :)
I didn't mean to dimish your achievement. It just rang a bell with me and I thought people might want to literally try doom.
I haven't tried your one, but OMDO (linked in GP) is an unplayable nightmare dizziness-inducing headache.
Getting shot at in OMDO really ruins the effect, especially since it's nigh-impossible to spot them quickly. I wish you could just play it without enemies.
Sadly, it’s basically impossible for me to play. Still awesome.