Alpha 2 (v0.2.2) is the currently available build. First and foremost it finally adds SOUNDS and MUSIC to the game and contains lots of BUG FIXES, as well as balance changes to the already available 4 weapons, and difficulty scaling for the aliens. A lot of other functions are still barebone, though, as it is still a fairly early demonstration build.
Alhpha Demo 2 is available here:
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