HTML5 is here to stay. People have already started creating epic games using this new technology coupled with a lot of JavaScript and a hint of CSS3. Here a few HTML5 Games that stand out from the crowd.
Pirates Love Daisies
http://www.pirateslovedaisies.com/
Epic Tower Defense game. Chances are you will be right at home with the gameplay if you have ever played a game on the internet before. This is super addicting, I had to play and beat all 4 maps, and I am lucky there were only 4.
Built using the jQuery and EaselJS libraries… by a whole lot of people. Microsoft being one of them? I guess that they were technically the client, still a bit odd though. You can read more development info.
Virion
http://apps.facebook.com/viriongame/
Side scrolling action. This game also has me coming back for more. The goal is to level up your virus with out getting destroyed by the blue stuff (they have a few names). Apparently it was created as an entry in the Hidden Agenda contest by Zynga. A contest so hidden I have never heard about it.
Virion was built using HTML5 and the Processing.js JavaScript library.
Biolab Disaster
Biolab Disaster was completely built for HTML5. One of the first real games on the scene. It is your standard 2D platformer, and it is quite enjoyable to play. While the screen is a bit small on the page, it is mainly a demo for the Impact Game Engine. I think the 8-bit graphics accompany it well.
Net Tank
This is a pretty straightforward tank game. The best (and worst?) part is that it’s multiplayer! Great if you have a friend next to you wanting to play on another computer.. but if not, no one is probably going to be on. This was created in 12 hours, with only ~600 lines of code using node.js and jQuery. Pretty impressive.
Robots Are People Too
Robots Are People Too is a another HTML5 platformer, though this one is much more complex. The game has no single player mode, only two. So find a friend, or just play both. The split screen mechanics and explosions are two really impressive things to check out.
The game and the editor are written in JavaScript and jQuery. The server is written in Rails. You can grab the fantastic code on Github.
Bonus! – Web Snooker
Know what Snooker is? If so, then you should be right at home with this game. For the rest of us, it is played using a pool table, and you hit some balls, but not other balls. Anyways, the graphics and UI are amazing on this game. You really need to just check it out for 5 minuets.