Patch #16: Upgrading Units and a new Spell!

Hey everyone 👑,I have studied all the feedback from the last update. Some loved all the changes, but especially the change to how upgrading the units works seemed to be very divisive. The update was so big and tried to address a lot of problems at once, so I was never thinking it would be the final solution. But especially as a solo developer, I need to try out what works and what does not, and most importantly why. So, after taking a step back and considering all of that, here is a small but important update to finalize that vision:Units can be upgraded for resources againThis idea came from a player, and while it seems like a going backwards at first, combining it with the nightly promotions for coins could be the real solution.The intention of this whole change was to make the game less...