I;d push the fact that it’s web based and you don’t need Photoshop. You have done so in your description to an extent, but I think it should be more ‘shouted from the rooftops’.
At first glance it looks like somebody has mistakenly added a tri-fold template to the wrong marketplace. I’d start with the name and go for something like “Web Based Mockup Generator - Tri-Fold Edition”.
Sure, it’s a bit wordy, but it gives people a much better overview of what it is and what it does at a glance. It’s not that you don’t explain that in your description, it’s just that people might not read the description if they think it is what they think it is… when it’s actually something new and exciting!
Then I’d add some ‘Photoshop not Required’ action in the very first preview image, to grab the attention a bit more. Maybe get a bit ‘salesy’ as well, but not too much…
No Photoshop? No design skills? No problem! ‘Web Based Mockup Generator - Tri-Fold Edition’ is a new and exciting tool that allows you to make high quality, professional mockups in a matter of minutes. Even for seasoned Photoshop users, this indispensable new tool will break the shackles of smart object oppression, and allow you to experience true creative freedom in the scale, rotation, position, lighting and foldyness of your tri-fold creations. If you need mockups, then you need the Web Based Mockup Generator. Come with us on a journey of adventure as we bold mockup pioneers usher in a future of the most magnificent mockups the world has ever experienced. Take my hand… and click buy it now. You know it makes sense.
Ok, I maybe went a little bit too far there. But yeah, it’s a great item, you should pimp it out!