I absolutely love the logo and the sword's design. They both look very iconic! The art for the game is really well done, with special emphasis on the UI work. The UI design, the font chosen. It's just so well put together, consistent, and it compliments the aesthetics of the game perfectly!
I also really love the animations you get when you confirm your layout. The music is perfect, being enjoyable whilst allowing you to think, and the sound effects are very satisfying. A standout for me was the victory SFX. That one felt especially satisfying!
It took a bit for me to understand how everything works, though the timer being paused when you're looking at the objective or the information guide is a godsend. Whilst I could've had the power go over the minimum amount required, I tried to match the numbers exactly as they appeared, which made the game a bit tougher. Because of the way I played, I ended up using things like supressors.
It did get to a point where I didn't have to worry about energy costs, since I was able to accumulate a lot of them. I also ended up not using any of the connectors. I did have to start worrying more about the layout and space though, since the amount of Defense nodes required started to get higher.
A suggestion I have is to have some sort of training mode where the player can just experiment with the different components and the board without having a time limit or an objective. It'd be purely for experimentation and learning purposes!
I'm very impressed at the complexity and depth of this game. There's a lot to it and I can see many interesting challenges that can be possible with this. I made it to day 21 and had to expand the board to the maximum capacity. I enjoyed wiping some of the dust off of my brain with this. This is an awesome game!