I kept thinking of Spalding Gray's Swimming to Cambodia when watching this, the best compliment I can give. Both films involve a monologue - one that's interesting and dense enough to require multiple viewings.
The challenge is engaging the audience - Clarke uses voiceover and manages to keep things feeling alive and moving for the entire runtime. Jules Roscoe's performance is perfect - this is such a specific tone and she nails it.
Also it's really funny!