Hi Jakub! Thank you for your feedback. We’re working on a quite big overhaul of the plugin and the updated version will be out sometime next week which includes decent CSS parsing (currently some of the CSS properties are not allowed to make the plugin as usable as it should due to the Plugin Review Team, however I believe we can work around this) and asset uploading, so you can upload your images and sprites with ease and include them in the editor.
We’ll also add font-size changing feature to our list of todos.
