hi first of all, sorry to say just this, but the preview looks poor with the mockup that u used … this clearly does not look “realistic” and no one “can buy it” as it looks like you have been much in trouble to adapt what u did to the mockup … pls keep mind that the presentation of your item is not a detail but has a true impact on how people feel about your work in a general way , even if the mockup, in fact does not really have to do with it …
besides, if u are not convinced with the impact of the mockup, check the part where u have the computer illustration … the ellipse looks uneven and same goes with the illustration inside …
Honestly , also for me all is clean , yes , but all is a bit flat too … typo wise and hierarchy wise , in fact there is nothing popping out this much and this also has an impact on your item and how attractive or not it might be for people … this part is having a negative impact in a general way but in particular with reviewers i might add , and u have to identify this, as they are judging typo as clearly essential and expect from u to have font combinations , a bit originality in the typo part and the whole thing to look both pro and harmonious , as well as a bit original too so that u have an additional value to offer with your item …
for me colors could be reworked and made a bit more subtle , your item would look better if u did …
i would also like to add that the cover’s typo is a bit outdated in my view, yes u managed to create a clean and a bit original combination for the cover but the typo u used looks quite old and i am not sure this is keeping with what people are expecting for nowadays …