Engine systems:
Renderers:
Canvas 2D API render test (primitives, sprites, animations...)
WebGL render test (primitives, sprites, animations...)
Input system test
Audio system test
Colliders test
Object pooling
Tileset (WIP)
Parallax (WIP)
Example games:
BrokeOut
Floppy Derp
Twin Stick Shooter
Twin Stick Shooter 2 (more complex)
Basic Tetris
Complex Tetris
Snake
Columns
Puzzle Bobble
Pacmon (WIP)
UI and menus:
HTML + CSS main menu
HTML + CSS main menu and game UI
Box2D:
Box2D basic
Box2D basket
Box2D platformer (WIP)
Other example projects:
Mode7 (like SNES, sort of)
Lines intersection