It looks good. Response is good. I noticed however that there is a slight delay the first time I go to a page. Subsequent views of a page use items from the cache. You might be able to optimize it so the first view is also fast, but I do not know how.
I basically aimed at helping you out with the flaws that I found, so that your hardwork pays you well.
The alt tags of the image should be defined according to what the image says and incorporating keywords into it is an add-on. These tags are basically used to describe what image is all about.
Also, if possible try pushing the keyword to the beginning of the description, as it can help you in improving the CTR from image search engines too.
And Joana, If we talk about meta description – It is important that the Meta description of the webpage should lie between 150-155 characters with spaces otherwise the exceeded characters will be automatically removed in the Search engines.