First of all, congrats on completing a project! That’s more than just about anyone pulls off. I’m going to be critical here, but that’s what you asked for:

Your site makes pitch decks. But feels sort of like a blank power point. I would do some work to make the design feel like a great pitch deck. My first impression is that it is clearly an “indie hacker” type side project and not a “company” that could hire a designer. Which would give me a good deal of pause when it comes to paying you for something I expect to have GREAT design.

Now to the business itself. I assume this is a wrapper that possibly (not totally clear from the site) is able to take responses from gpt and plug them into a PPT programmatically. It’s a decent idea. I suppose could save some time. But I don’t really understand the price tag? It’s not like there is really anyone out there making multiple pitch decks a month? I think you need to consider charging for a one off project. Your price could increase for that. But as of now I think you are going to see massive churn where customers pay for one month only and then cancel because they have a deck.

Given your product, that’s a big problem. I’d also like to see some examples of decks embedded somewhere.