Everything is basically identical to standard Brainf*ck except...
meow moves the pointer right.
nya moves the pointer left.
mrow increments memory cell at pointer.
mrp decrements memory cell at pointer.
purr outputs the character signified by the cell at the pointer.
mew inputs a character and stores it in the cell at the pointer.
mlem jumps past the matching zoomy if the cell at the pointer is 0.
zoomy jumps back to the matching mlem if the cell at the pointer is nonzero.