The Writers' Circle

I like the substance of this poem very much, but I must point out a few errors in punctuation I found that would have made the poem perfect if corrected:   The first five lines are each questions, so there should be ? marks at each's end.  The contraction in line six should be "It's..." for it has.  Line seven is a complete sentence, and so should end with a period.  The same contraction in line eight should also read "It's," and there should be a comma between "nothing" and "I."   In line nine, "worlds" should be written as "world's."  Line eleven is a question and should have a ? at the end.  In line twelve, "Would" should not be capitalized.  Line thirteen is an interrogative sentence, and should have a ? at the end.