If your friends with Android phones can't seem to put their device down this weekend, it's probably because they've been drawn into the Angry Birds phenomenon. The popular game hit the Android Market Friday afternoon after demand for a version on the GetJar app store took down the companies' servers.

Users can now download Angry Birds for free via an app that game developer Rovio added to the Android Market today. See the slideshow below for screen shots of the game in action on a Motorola Droid.

The move comes after a free version of Angry Birds was released Friday morning via independent app store GetJar. Rovio and GetJar, however, couldn't handle the demand, and both of their sites crashed.

Although Angry Birds wasn't slated to be released in the Android Market on Friday, Rovio then added it to the Google-run app store since people were unable to get it via GetJar.

GetJar said via Twitter that it had 90,000 downloads "in seconds." When it crashed, it directed users to m.getjar.com to download the app directly from their Android phone. The company later tweeted that GetJar was back online, but "if 2 slow try Market."

Those who did manage to download Angry Birds on their Android phones, however, noticed that it did not support multitasking. Earlier this week, Rovio tweeted that it was delaying the Android release of Angry Birds to "add proper multitasking." But PCMag camera analyst PJ Jacobowitz downloaded the app on his Droid and found that the feature was not enabled.

Multitasking allows you to close out of the app - to look at a text message, for example - and then return to the game where you left off. When closing out of the Android version of Angry Birds, it shuts down the game. Opening the game again re-loads the entire app, with previous activity erased. Rovio did not immediately respond to a request for comment.

The 195-level ad-supported Angry Birds is free in the Android Market. A premium version is slated to be released soon, sans advertisements.

The game has already been insanely popular on Apple's iPhone, and it's been downloaded more than six million times. Priced at $0.99, it sat at the number one spot in the App Store until recently. It's also available for Palm and Nokia phones, and a demo version with just 15 levels is offered for Symbian phones.

PJ Jacobowitz contributed to this report.