Sure R0J0hound give him the easy way

You can use already existing parsing libraries (like rex_hash, Array, or possibly the dictionary object).

Look at rex's hash table thread for examples on how to use rex_hash to parse JSON.

Your local storage keys can be in any form (of string).

It is exactly like other languages. For example, in Java Google's Gson library is almost exactly like rex_hash is for Construct.

?

Right now, our primary layout is 10,000 px x 10,000 px with around 30-40,000 sprites visible at once. It works, but it is pretty taxing even on fairly beefy machines at the moment.

You can use actual Sprite objects for buttons, they are easier to work with visually.

Do you want active commands, or no? If you want a handful of functional commands, you will have to reprogram all of those in your project.

I would use D3.js

http://d3js.org/

I would use Pode's iFrame and have one host Construct file and two subsidiary projects. You would have to be very careful about input controls though.

What is an add/drop player system? For multiplayer?

You have to select a Construct object that best represents the type of data that you want to save, then export that object as either XML, JSON, or some other data format as a text string into the web storage.

All sprites have an "Angle" parameter that you can either set manually or via event. Just do like:

Sprite: Set angle: Sprite.angle + 90

Like JeremyBenson11 says.

I can. PM me for more links/etc.

Make one sprite be the "top" chip and another partial sprite to be the lower chip, then when the button is pressed make a new partial sprite under the stack after moving the existing chip sprites up a few pixels.