I'll re-explain the concept, in case you haven't done one of this style before. Imagine folding the grid into thirds vertically, so that the left and right edges connect. Acrosses read over two faces of this 3D shape, so most answers are split in half with each fragment being the start of one answer and the end of another. The clues are attached to the "starts" of words, with square brackets to tell you where the second half is located. Downs and black squares work normally. These puzzles are always a little clunky, because the software (rightfully) isn't expecting you to be doing crossword-igami like this, so please excuse the jank. Happy solving!