This was always going to get a review, I mean, anxiety is so relevant to everything on the internet. Indie Shuffle is based on the internet. It's a no brainer.
Just imagine there were new levels to your anxiety. I'd say I've at least hit 3D, but never 4D. I don' think there is any coming back from that.
I think 4D anxiety could arise in a scenario involving nuclear warheads. Nuclear warheads and four exes peppered on hallucinogens. That sounds disastrous! Mix in a claustrophobic setting and BOOM, you've got 4D anxiety.