A heads up for the next time you have a question; you have to post your actual .love file in the topic if you want us to help. There's nothing we could've done with just that little piece you posted.

I don't have much time but I probably can't resist throwing in a few hours anyway... but no idea if I'll be able to finish anything :p

Löve is merely a framework; in the end it's still running Lua, which means you have access to everything Lua can do. Including the option to run C++ code from libraries you make.

Okay, I understand better what you mean with frame-precise moves. Answers to your questions, not neccesarily in the original order: In the case that the chain-finder is a separate thread, what would happen if it doesn't find the chains fast enough? Would it be a sort of visual lag, where there's cle...

Quickest way to reload the game would be to call love.load() again, since that's what you use to set the game's initial state

Love2d supports setting a color's alpha through the 4th argument to setColor:
Unless you mean something else I'm not sure what the problem is?

Go with the setter function(s) if these are unrelated things that happen to change in sync. But if, as ivan suggests, you are using 3 booleans to track a single thing (such as difficulty level) you'd be better off making a single variable and storing different values in it. It'll save you a lot of h...

What kind of frame-precise maneauvers are you talking about? I didn't really see anything in the video that wouldn't work just as well based on time elapsed as it would based on a fixed framerate. Maybe if we understand why it needs frame-precision we can help with it. (It's something a lot of peopl...

I don't think that globals impacts performance They do impact the performance somewhat, as Lua first needs to check whether a local variable by the given name exists, and then has to look again in the global table after it finds it does not. However: Hello folks,I`m using middleclass for OOP but i`...

You'll still have to keep that huge image in memory, so that will impact performance somewhat (mostly in how much memory it'll take up).