I stepped away from this game for a little while because I had become stuck like many others. Since I've been back, everything feels fresher and more fun. I think I even like the name change. This has been great to watch grow, and I hope it continues to improve and evolve. And thank you so much for adding a mute button!
I feel like this game would be improved if I could go back and play older levels. I'm already tired of getting stuck on a level, and having to wait 15-60 minutes for some upgrade to go through and hope it helps me actually clear a level. Sometimes it doesn't, and I'm due another 15-60 minute upgrade. It really slows the game momentum down, and makes me want to stop playing.
Maybe it would be a good idea to not make the player wait for 5 straight minutes of nothing right after starting the game? Might keep people engaged a little longer. My 5 minutes isn't even up yet, and I'm already considering clicking away.
 "Global Assault"){kind=icon}
 "Viking Warfare"){kind=icon}
 "Critter Conquest"){kind=icon}