Just to ride my hobby horse before I get to the meat here: There is not a damn thing Victorian about this game. The music is either heavy metal or an early popular recording; 'popular music' from the era would have been English music hall or American marches. While some of your victims ride penny-farthing bicycles, you're on a conventional geared two-wheeler, and nobody in the era made ox-horns as a symbol of triumph. Menu graphics that look composed of Dover Press Victorian stock imagery do not, in themselves, say "Victorian."
So never mind.
In stark black-and-white graphics, you play Death on a bicycle, riding along a 2D linear geography with various victims en route -- some riding, some stationary, some hanging in the air above. You can accelerate, slow, jump (leaping from precipices is often necessary to get some score-providing victims), and what the game describes as "lean" but is actually "yaw" -- rotate forward and backward.
Score maximization requires you to perform tricks -- wheelies, 'big air' and the like -- while also harvesting as many souls as possible.
The music sounds like Blue Oyster Cult, and is suitably gnarly.
This is Pop has once again done what they are best at: Taking a well understood game style and tweaking it with an off-kilter and amusing frame. The gameplay is utterly what you'd expect in a BMX title, perhaps at a lower level of difficulty since this, after all, a Flash game; but marrying it to Death, a Victorian graphic style, and heavy metal of the 70s produces something altogether pleasing.
Port and walnuts for the developers, my good man.