Yeah! The reason why Beta 1 haven't released yet is because it’s been going through few development changes and the foundations of the game is still being worked on I assume.
The only main thing they’re doing is testing some features in the test floor, getting the map voting polls done and hopefully they can work on getting the floors implemented to the game! Of course they would have to redesign most of the textures, since it’s mostly placeholder assets.
You should also look forward to Progress Update #19 when it’s out, because it could be very important.
Another reason why it’s taking a while is because, Beta 1 will mostly have several improvements like the boss fights for example.
Beta 1 will be the most anticipated update for this game and it’s where the game is shaping things up a lot more than ever!