You should probably hit up the manual and tutorials link since your question is too broad to give a concrete solution.

https://www.scirra.com/manual/174/multiplayer

I figured it out:

Condition: On key code pressed (key code 18)

Action: nothing

[attachment=0:2jhj0r4a][/attachment:2jhj0r4a]

Hopefully this will help someone in the future.

Noice! A whole lot of sexy going on in that picture.

I have noticed that when I am moving left or right, if the ALT key is hit it causes the object to continue in that direction until the end of the layout when played in browsers (opens the menu options for the browser). Does anyone know how I can stop this from happening withing Construct 2? Otherwise my option is to create a javascript method of capturing the ALT key. If more information is needed I can provide it.

Very helpful. Thank you!

Thanks Lordshiva1948 and rho, those are great pieces of information. Gives me more to think about.

Excellent information codah

I have. Doesn't really do much for me other than rule out local variables for most things I am doing. I Guess, at least in the context of my game, it doesn't really matter if I do it globally or as an instance variable. Given you didn't hint at there being any real performance benefit between them, I will just keep things the way they are since it currently works and that is what matters in this stage of the game. Thank you.

Which is better? Global variables, local variables, or instance variables? Currently most of the advanced stuff I do with movement and shooting has one or two global variables. Is it better to do that, set up instance variables, or local variables? Based on everything I have read I don't see any of those options making an overall impact on the speed or efficiency of my game. I guess at that point it comes down to ease of use? What are you using or what or your thoughts on the matter?

Thanks —! I am just going to have to set small goals to achieve with the AI and implement them one by one. Otherwise I could pretty much have a decent multiplayer game, but that is all it would be good for at the moment.