You are using the authentic Android version of the game.
An activation key (also known as a CD key or license key) is a unique, alphanumeric code that verifies your purchase of a game.
If you have an older installer, you can try these community-shared "universal" keys, though their success varies by version: THET-ALEV-LEFR-USWO AAAA-AAAA-AAAA-AAAA FULL-GAME-SOFT-WARE angry birds space activation key pc link
Since there is no official "PC link" from Rovio anymore, players rely on trusted archive sites for the setup files.
If you cannot find a working PC copy, or you simply want a fresher experience, here are some great alternatives: You are using the authentic Android version of the game
The has preserved the original installer files for Angry Birds Space v1.4.1, v1.6.0, v2.0.0, v2.0.1, v2.1.0 (Steam versions), and older standalone versions. While these are the original installers, they cannot be activated without a working activation server. The Archive’s page explicitly notes:
Q: What is the cost of the Angry Birds Space activation key? A: The cost of the activation key varies depending on the retailer and region. If you cannot find a working PC copy,
Extract the files and run the AngryBirdsSpace.exe file as an Administrator.
and install the game to your desired directory. Launch Angry Birds Space.
I need to open some of these pages to gather more detailed information. I'll open the G2A page, the Internet Archive page, the PCGamingWiki pages, the Steam discussion, the Wikipedia page, and the Rovio support page. have gathered information from various sources. The G2A page shows a key for sale. The Internet Archive page provides an installer and a key. The PCGamingWiki pages indicate that the game is delisted and the activation server is dead. The Wikipedia page confirms the discontinuation date. The Rovio support page explains why the game is no longer available. The Dark Reading article highlights the risks of key generators. I also have search results for demos, key resellers, and other relevant information.