For the Alphas,

The story won’t be told. Instead, you get to experience how the game will play out. Here’s how it works: you play a Stage in which you defend yourself from the enemy UFO’s and get to the finish. Or you optionally look for the collectables and unlock the secret exit. At the end of each level, you fight a boss. The bosses get progressively harder, each time getting stronger attacks and more health. The Game Jolt Edition’s Final Boss will be in Alpha 3. Every boss is different, except for Stage 1.
When Alpha 3 is released, the secrets will have better reason because after fighting the Final Boss you play a Secret Stage and fight a Secret Boss! Keep in mind the Secret Ending is MUCH HARDER to finish, but it should be fun!

I will update the news again soon!

The Alpha should be out within a couple days!