Instant Jam, from InstantAction, the online game that lets you rock out with your own tunes just got a major update including a Flash version. Also, Mac users are going to get a full-blown version of the game so they too can get into the game with all the features. Now you can play the game right here at GDN.

Key updates, improvements & additions to Instant Jam:

• Mac play: Our new Flash version of the game, now offers a great entry point Mac users to play along with their music. (A full-featured 3D Mac version is coming soon)
• Faster, better 3D PC: The full 3D PC version of the game now has:
  •  Significantly faster load times
  •  WMA and FLAC audio file support added
  •  Faster song matching
  •  Improved Song ’Smart" Fingerprinting
  •  In-game lighting enhancements
  •  Navigation and UI improvements
  •  Balanced currency exchange rate
• New Power-Ups: Now choose from a selection of power-ups before each play to increase your score and get closer to that 100% completion
  •   Free Missed Notes
  •   Notes Until Multiplier
  •  Starting Jam Power
  •  Starting Multiplier
• Get Bonus Coins and Plays: Purchasing a song on iTunes or Amazon through Instant Jam gives you 1 Free Play and Coins for twice the song’s value.
• More Note-charts: Over 150 new hand-crafted note-charts have been added since the beta announcement, many which support recent album releases.
• Friendly reminders:
  •  Instant Jam is Free-to-Play and works with your music library
  •   Challenges do not cost a Play, so challenge your fellow journalists (*disabled in embed until 10/19/2010)
  •  The PC 3D version works with most existing USB guitars & can be played full-screen (Alt + Enter)
  •  Easily add music locations in the Settings menu

Current system specs:
PC:

• Operating system: Windows XP (32-bit only), Vista (all), 7(all)
• Browser: Firefox 3.5+, Internet Explorer 7 and 8, Chrome 5
• Flash Player 10.0+
• Java 1.6

PC 3D:

• In addition to above: DirectX 9.0c+, IA Player
• Also supports most USB guitar controllers

Mac:

• Operating system: 10.6
• Browser: Safari 5, Firefox 3.5+, Chrome 5
• Flash Player 10.0+
• Java 1.6

Play Instant Jam right here at GDN

Also, if you’re logged into GDN through Facebook you’ll be able to share and challenge your friends right from the game.