Hello,
Finally, we can tell you the exact date. On May 27th, we will release the game in Early Access as a paid version for 10 USD with exclusive items.
If you want the exclusive Alpha items from our two packages on codezin.com, you still can buy them, as you can link your Steam account with the standalone account.
As soon as we go Free-To-Play later, you can not get these items anymore!
See you soon in-game!