From what I see (haven't played the demo nor watched any of the demo, just basing it off the alpha experience): 1. You can probably put Princess between Obsidian and Frog so the Obsidian gets the temp buff from Princess while Frog turns to a Knight. 2. Egg Tower offers more consistent levelling for the Dragon Tower so you're guaranteed a +5xp each turn for Dragon. Not to mention Dragon gives extra gold as well so Egg towers are free apart from taking one tower slot. 3. I think probably around the late game stage you'd wanna sell Chest off as although it helps generate gold, the lack of scaling is really jeopardising your survivability Gameplay wise my only nitpick would be Snake could've been sold for other towers in Act 2 since it was not really appearing and the minions have far too high stats to be affected by the -2 stat But good game! Hope to see more of this