<canvas> javascript game frameworks

Do you know any except GameJS, which actualy isn't working on my pc, in FF3.5 i try to start attached jetris demo and i see nothing, even firebug console is clear.

I tried开发者_运维问答 something called GameQuery, looks nice but it's working on pure DOM, im interested in CANVAS.

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Its fairly basic but what about http://mccormick.cx/projects/jsGameSoup/