Great work! Congratulations on launching your landing page. The website design looks slick and I love the choice of colours. Did you do the design work yourself?
From a product standpoint - mindlog looks like Pocket meets Pinterest meets Evernote. Is that the intent? If it isn't you need to rethink your copy.
I would say one of the major things is that you should move the "registration" module to somewhere above the fold and focus on it more.
Also I suggest you make the tagline bigger and feature it more prominently in the middle of the cover image. This way, you can take off the "Q: What can mindlog be used for?" from the overlay and just have something like "Jack uses mindlog to...."
Last thing: the far left hover screenshot popup was broken for me, the other 3 worked perfectly fine.
Good luck!