Straightforward and fun game. Controls are smooth and collision is perfect. Music is nice.

Apart from more levels, I would recommend a higher-contrast arrangement for the text. It was often hard to read. I would suggest either a simple background banner appearing behind the lettering, or a light-colored font with a dark-colored outline.
 

The big red book would throw the character in the air, then on landing it couldn't move anymore. This happened 3 times. I get what you going for, so you idea/concept was good. Your are and music were nice too. 

Nice concept, and gameplay was solid. I think the art could use some work, the background was a bit distracting and made the text hard to read. The text on the books was pretty hard to read too. I think with some tweaks to all that, and maybe increasing the speed, the game would work a lot better.

Pretty nice art, but the game felt a little slow.

That was a pretty cute platformer. I liked the puzzle aspect; although it would have been cool to be able to zoom out and see the whole level to stop it feeling too trial-and-error :)

Nice! but one bug: if you are close to an other book you can do a dubble jump and it doesent matters which whight you have you can just jump over the limitated books

Its better than mine