This is an interesting request because is the very first public release of that game (March 2012). Finding the exact 1.0.0 APK today is difficult, but its most interesting feature compared to later versions is:
Released on , Angry Birds Space 1.0.0 marked a major evolution for the franchise by introducing gravity-based physics and interstellar environments. This initial launch version for Android (APK) featured a 22.81 MB file size and was compatible with devices running Android 1.6 and above. Core Gameplay & Mechanics Angry Birds Space 1.0.0 Apk
Rovio famously re-tuned several early levels in patches 1.1.0 and 1.2.0 because players found them too hard. The original 1.0.0 physics are slightly looser, and some "three-star" thresholds are stricter—a treat for veteran players. Angry Birds Space 1
If you want the game as Rovio originally intended—challenging, atmospheric, and ad-free—the 1.0.0 APK is the holy grail. Core Gameplay & Mechanics Rovio famously re-tuned several
, a title that completely flipped the script (and the physics) on the classic slingshot formula.