M×N-Dimensional Brainfuck

M×N-Dimensional Brainfuck is a brainfuck derivative with an M-dimensional tape and an N-dimensional program.

The initial pointer direction is positive in the first dimension.

The initial program counter direction is positive in the first dimension.

Instructions

Instruction	Description
>	Move the pointer forward
<	Rotate the pointer direction
+	Increment the memory cell at the pointer
-	Decrement the memory cell at the pointer
.	Write the character in the memory cell at the pointer
,	Read a character and store it in the memory cell at the pointer
[	Rotate the program counter direction if the memory cell at the pointer contains zero
]	Reverse rotate the program counter direction if the memory cell at the pointer contains a nonzero value

Rotating from moving positively/negatively in the nth dimension results in moving positively/negatively in the (n+1)th dimension. Rotating from moving positively/negatively in the Mth/Nth dimension results in moving negatively/positively in the first dimension.