You can play a demo. It features a small-ish quest. Things may change dramatically on the quest. There's a bug where the sound is set to 0 by default. That's why you don't hear voices.
Is the game ready? No.
Can you play through it now? If you are asking if there is a full game there, yet. No. Not even close. Like I said, there is a demo. It has a beginning and end.
The writing in the actual game hasn't progressed much further than the demo, but we've got probably 75% of the story mapped out. We're trying to hash out the other 25% in the 1-3 months. Once the main & branching storylines are decided, it should only take 2-3 more months to finish the rest of the writing. From there, it should be about 3 months for the programming, art, music, voices, etc. So, the best guess I can give at this moment is before Christmas.
The art is almost done! In fact while waiting for the writing to get done, we made an entire game. Ur-Quan Masters HD! :) Some of the aliens may change a bit though as the story evolves.