Well the initial snap impression is that the ad isn't very good. But let's talk about how this could have been done better.
For starters, I would not pitch a real world get stuff in your mailbox service with animation. There are no photos of the product, the explanation of how it works and why it's not a scam is hand wavy. I don't care how it works I care about what's in it for me, the buyer.
There are no clear examples of what you'll get. There is no sense of who is behind this service and why you should feel connected and like you would trust them.
In addition the implementation tactics are suspect. You targeted hardcore gamers, but you're not selling games. That's almost a complete non-sequitur.
Your goal was to target people likely to purchase candy, or perhaps Japanese novelty items, via a mail subscription service. It doesn't appear that you made much effort if any to figure out what that audience looks like and how to reach it.
One of the reasons digital advertising can be so effective is that it allows you to try multiple different approaches at the same time. Nearly every successful PPC type campaign starts with multiple theories, different hypothesis about who the audience is and what they'll respond to.
You try a few ideas, see what works, track sales and intermediate metrics (clicks, engagement, time on site, add-to-cart behavior) and then continue to direct your budget to things that show signs of yielding positive ROI.
These things are to some extent always a roll of the dice, but there are definitely some things you can and should be doing here to improve your odds of success.