BETA: Version 0.99.3
The spawn mechanics for the Spirits Tower have been rechecked and fixed (it was spawning too rarely due to a bug).
This update has been uploaded to the beta branch. If you want to play with the new pack now, right-click on Epic Auto Towers in your Steam library, then select "Properties..." -> "Betas" -> "beta - Beta Branch." 
In the library, the game will now look like this:
