The letters in "revolver" match the arrangement of chess pieces on the first and last rank of the chessboard.
Two versions of this film have been released: the original version (which makes more sense and actually flows as a story), and the second version released to Australia and other countries containing deleted scenes as well as an altered order of scenes, and doesn't flow as smoothly as a narrative.
The stack of bills Avi sniffs are $12 bills. The written-out words also say "Twelve."
In keeping with the "chess" theme of the movie, the first person they loan money to is Mr. Horowitz. I.A. Horowitz was a major chess master and chess journalist in the early 20th century.
The most common Google search for this film relates to "Who is the girl with the lollipop?" Her name is Jasmine Lennard, a model and reality show star.