The following are only a few highlights of Gamvas Web:
Sprites with states and animations
A actor can have unlimited number of animations that can either be synchronized with the states or can be handled completely independent.
Box2D based physics
State system for the application
The same state system as for actors, does exist on a application wide level, which allows you to split your game into states like intro, menu, game or high score table.
You can have cameras that you can move, rotate or zoom independent from each other.
A resource manager can give you information about how much resources are already loaded and you can draw a loading screen with progress bar until everything is loaded.
A fast and easy general purpose particle engine which allows you to create many effects from rain, smoke, fire to sparkles.