LÖVE

I'm having lots of difficulty getting Love to run. Well, first, I'm using Ubuntu. I downloaded 0.5.0 through the Ubuntu Software center, but every time I try to load some of my Lua stuff, I just get a black screen. When I open Love without a game, I get a friendly "No Game" animation. I tried downloading it from the website, but when I try to install it, it yells at me for having an i686 processor instead of the x86_85 (or whatever it's called)... help?

You might notice that there are two variants: 32-bit and 64-bit. You tried one variant, but you need to try the other one.

Uninstall that version. It's too old. Instead, install the one from the PPA.

Here's the full list of commands. Execute one after the other. Since they are preceded by sudo, you will need to provide the administrator's password command, at least on the first line.
Note that this is for more or less recent Ubuntu distributions. If your Ubuntu is ancient, this might be a bit more convoluted.

I already tried both 32 & 64 bits

And I uninstalled it, followed your directions, which now gives me 0.7.1, but, when I try to open my game folder, not even a black screen shows up (and I have more recent Ubuntu distro.)

...I did exactly what Kikito wrote, with Ubuntu 12.04 (is 12.10 out?), and I got LÖVE 0.8.0

I'm using 10.04, hahaha. Maybe I should update....

Sullinger wrote:(and I have more recent Ubuntu distro.)

Suggestion:

10.04
Blue's the year (2010), Green's the month (April, 04)

It's pretty recent.

It's from 2 years and a half ago, and Ubuntu updates every six months

When you put it like THAT...
Well, I'm upgrading right now.