I like that this could potentially serve as an alternative to CoinMarketCap, as I have yet to see a site that comes close to its functionality. I do have a few words of advice I would like to give, however. I am no design expert, but the scaling on the website seems slight "off". It seems, at least to me, that all of the text, buttons, and textboxes are unusually big or are occupying too much space. Furthermore, it also feels like you are browsing a mobile website even when you are on a desktop computer. For example, the menu options to the top left are something straight out of a mobile website. There is already way too much empty space in the page, in my opinion. You could use the top navigation bar to put the links to the different parts of the website that are currently accessible from that menu.
Additionally, another reason I use CoinMarketCap is because of its well-documented API. Are you planning to release a public API to compete with theirs? A lot of online and mobile applications depend on data from CMC's API, as there is a huge developer market for a central API to use for all cryptocurrencies.
Did you go past the home screen? It seems like you're only describing the landing page. It is setup to display differently on mobile devices than on desktops.
There are no plans to offer an API at this point. Yours is the first request for it. It will be something we discuss after the next update is completed.