Truly cross-platform browser games

HTML5 features continue to amaze. The man known as KesieV came up with and developed a set of libraries, tools and presets for developing 8-16 bit indie games using Javascript, using a bit of HTML5 features. No flash. For the Javascript engine, five demo games were written - pacman, aerial shooter, platformer, action-RPG and tetris. It's amazing that all these games work not only in all modern browsers - Opera, Firefox, Google Chrome and Safari - but also in modern smartphones - Android and iPhone, in the latter, on-screen buttons appear. The speed of games is impressive, especially given the fact that, as the author writes, the engine is not yet finalized.
Actually, you can try all these demonstration games on this link . Standard control in PC-browsers - keyboard buttons Z, X, C are analogous to conventional buttons A, B and C, and arrows are used to move a character / menu item.
Under screenshots.

Pac-Man in Firefox:

Tetris on iPhone: