Anyhow.
Talk about how web designers in specifically should be using this rather than getting their feedback over email with non-descriptive explanations like "I feel the paragraph was overshadowed by the icon." "What icon?" "The green one." "On what page?" "The home page." "Oh yay after 3 emails I finally understand what you meant!"
Get Beta Access doesn't read as a button.
The hero shot is a lovely photo and I don't want to crush your soul about it, but it sells a lifestyle of working on Macbooks in hipster cafes, not your software. It is impossible to tell, at that point in the sales process, that the fake website which gets 100% of the screen-within-a-screen real estate is not actually the point of the shot, but rather, the UI that gets 10% of the screen-within-a-screen real estate is the point. That UI is unreadable to me, both literally and figuratively. Your animated explanation later on the page is superior in explaining what your software actually does.
You should probably sell this face-to-face to designers at meetups/etc. Give away two dozen beta accounts to actual people in real life, with that crazy founder gleam in your eyes. If they don't use it, pester them about why. Answer the objections in onboarding -- e.g. don't have a website that I need feedback on right now, didn't get the snippet installed, etc.