Hello need advice for my item, got hard rejected

recently i uploaded in codecanyon phpscript item with miscellaneous category, here is my demo http://www.vobba.my.id/ and the reviewer told me “unfortunately we found it isn’t at the quality standard”. Is there any advice from you guys? before i create a new project so i can aware and be more carefull 1 or multple things to do. Thank you, i appreciate for your help.