There's been some talk on ~ before, and it seems like there are quite a few people who are either interested in, learning, or working in game development, so I thought this could be a fun programming challenge.
This one is fairly open-ended: make a game in 1 hour. Any game, any engine, don't worry about art or sound or anything.
Doing is the best way to learn. Most people's first project is something overly ambitious, and when they find that it's more difficult than they thought, they can get discouraged, or even give up entirely. This is why the 1 hour limit is important: it forces you to finish something, even if it's small. When you're done, you can come out of it saying you made a game, and you learned from it.
Chances are the game might not be fun, look bad, be buggy, etc. But don't worry about that, everyone's game will have problems, and if you do create something really fun or innovative, congratulations, you have a prototype that you can expand on later!
Like I said before, these "rules" are pretty simple: make a game in (approximately) 1 hour. You can use any tools you want. If you use external assets (art, sound), it's probably best you use something you have the rights to (see resources). If you're completely new to game development/programming, your goal could even be to finish a tutorial.
If you're the kind of person who tends to get carried away with these things, you might want to post a comment saying you're starting, then another one once you've finished your game.
Please share your finished game, I'm sure everyone would love to try them! If your game is web-based, it can be hosted for free on Github Pages or Itch.io. If downloadable, it can be hosted for free on Google Drive, Mega, Dropbox, Itch.io, etc.
If you're a beginner, a good engine to start with is LÖVE. It's very simple, and uses Lua, which is very easy to learn.
If you're familiar with another language, you could use a library to make it in that language. Some examples:
For such a short time constraint, I'd suggest you use your own "programmer art": just use some basic shapes. Your primary focus should be gameplay.
If you think you have time to find something, try looking on OpenGameArt.
You can make simple sound effects very quickly with sfxr (or in this case, a web port of sfxr called jsfxr).