My Opencart Item is Reject because of Quality Standard

Hello,
I am new author in Themeforest. I have build one eCommerce opencart theme “Electro Shopping” for upload in Themeforest but unfortunately I got theme rejection from reviewer with reason of “Quality standard required to move forward, and you won’t be able to re-submit this item again.”

Can any one help me for feedback ?
What type of changes I need to do in next submission. ?

Theme link : https://bit.ly/2GXuLV2