Aside from the gameplay portion which you're doing a wonderful job of improving, addressing and balancing, I just want to say that the lore, flavor text and such in this game is incredible. You've done a fantastic job of covering aspects of a galactic civilization and looked at some of the often overlooked concepts. Please keep this up, this is my favourite idle game thus far.
You've done an excellent job here. Every battle felt exciting and somewhat scary at first and made me think about how to proceed. The environments, setting and characters are top notch and left me begging for more. The combat was fun, items and money seemed rare enough to actually make me consider what to buy as opposed to just going the standard RPG route. I'd love to see this expanded in all elements. Even if you just release more of the same in Chapter 2, you'll have another hit. Congratulations and thanks.
Unit management is terrible. The difficulty also needs reviewing. I had no problem on medium up to the level with the Tauren Cheiftan. It's insanely hard. If it is possible, it requires a very specific skill build and that just ruins the depth of the game.
It looks promising though. 3/5.
There's a bug I experienced in the final battle. The enemies had cast spells (lightning storm?) and something else. What happened was the spell FX kept appearing on their hands and the game became unresponsive, only generating more FX around their hands slowly.
Running from battle fixes this.
1. Put values on the tower attributes, meters are hard to judge. A number within the meter is fine.
2. Speed increase/decrease functions.
3. Possibly alternate paths that different enemies use (air is overused - use water paths maybe? Would go well with the atmosphere you have going).
4. One tower with a relocate ability would be nice.
I might think of more later, but I love the art style on this game and want it to go far. Keep it up!