You can make games with Javascript? Yes you can, although nothing as good as you can make with Flash. Maze Adventure is kinda fun, though, try that one.
Mancala

This is another Javascript game, based off a real game that I’ve played a lot and really like. It’s a puzzle game, so the graphics/gameplay itself isn’t very exciting, but you might want to give it a try. I admit, though, I didn’t write very good instructions, I’m sorry.
Maze Adventure

Currently the biggest game I’ve ever released. Run through 30 levels and even edit your own! It’s made with a lot of complex Javascript, this came before I started playing with Flash. This is actually a pretty cool game, and I hope to make a Flash-based version someday. I recommend giving this game a try, although it can be a bit buggy sometimes.
Hallway Adventure
One of the first games I ever made. It’s mostly made with HTML. Yes, you read that right, it’s an HTML game, and therefore pretty bad. I’m not providing a link for it, I don’t know why I even acknowledged it’s existence.