Write well-structured, easily maintained JavaScript code following accepted good practice, including

• general appearance and form: well-commented, properly laid out, appropriate capitalization. 
• structure: modular, using functions, classes and objects effectively, making effective use of variables.
• standards-compliant: avoiding proprietary elements where possible and working with the vast majority of web browsers.
• accessible: usable in some form by people with a wide range of disabilities or, if not, failing gracefully and offering alternatives to achieve similar functionality.

• Code is well commented, and functions are documented using standard JsDocs.
• Objects are used repeatedly throughout the program, and in some cases making efficient use of prototypical inheritance.
• Works in all current major browsers.
• Content is created for a specific niche of people, and can be used by the audience that it targets.

Make effective and efficient use of a full range of programming constructs including sequence, selection and iteration.

JavaScript is a funny cross between procedural, object-oriented, and functional programming, as such everything must occur in sequence. There are many actions that must be performed in a certain order or else required variables and value would be undefined crucial points in an algorithm.

Conditions are used in many different places, mainly in logical algorithms such as most object update functions.

Iteration is used in the Infinite Skies Banner object to iterate through a list of background stars.

Effectively use variables, including passed parameters, local and global variables and arrays, to improve the efficiency, re-use, and maintainability of the code.

A huge amount of thought was put into structuring for efficiency, and although it is no where near perfect, I am pleased with what I have created.

 Global variables are used as sparsely as possible, objects and functions were created in a very modular method specifically for maintainability and re-use.

Use a wide range of programming features and commands to improve the efficiency, re-use and maintainability of the code.

Objects, prototypical inheritance, and functions were huge tools that were used in order to improve the mentioned attributes.

Write JavaScript code that works in all major browsers (including IE, Mozilla-based browsers such as Firefox, Opera, Konqueror, Safari, Chrome).

Has been tested and functions in all major browsers.

Effectively debug JavaScript code, making use of good practice and debugging tools.

Mainly used the developer tools across several browsers as well as stack overflow to correct errors.