HTML5: Physics Engine

Physics seems to be a challenging task in HTML5 and especially on mobile devices. Changes will not only be extensions to the current implementation but will also have an impact on the current rendering engine and existing features (bricks), e.g. Catrobat sprites are based on images, physics on vertices. Not only the implementation, also tests, requirement engineering, evaluation of existing physics engines are interesting parts of this project I would really like to work on.