HTML5
A game that I previously made in Flash, now in glorious Javascript and HTML5 Canvas!
It's just the basics of the game, don't expect anything magical.
Fork it from GitHub! https://github.com/MichielDeMey/Jetpack-Awesomeness-HTML5
Flash
The one and only, the original Jetpack Awesomeness!
Also with multiplayer and a small "how to play" tutorial.