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I had a lot of fun with this game. I know it's been a while since you made it, but I would like to know how it works. Unfortunately, I don't know lua, but if you could tell me the basic formula, or point me to a tutorial, I would be very thankful.


Hi! This response has been a long time coming.

You can access the source code here: Unfortunately, I made my own method for this, and it is pretty hard to follow. 

If I come up with a cleaner way to make these visuals, I will probably make a notice/post on this game, so stay tuned here. Otherwise, I recommend reading up on "raycasters," which can give you a very similar effect: