Thank you for taking the time to play the game, I appreciate your honest input!
1) You definitely have a point about the tutorial. I am not happy with it in the least. I originally released the game without a narrative tutorial, but many people who tested the game rejected it simply because they were confused and did not understand how to play, which surprised me. I put in the tutorial as a half-assed way to explain the core mechanics and it ended up being more work than i intended and got a little lengthy. I will look into implementing a better non-verbal tutorial in the future, I am just swamped with other things at the moment, but I can definitely make that button animate to draw attention to it.
2) In regards to the infection mechanic, this is how it is supposed to function: A drone infects a random turret every so often, if the turret is not selected and the signal is not jammed (via the console where you can match the nodes and the frequency of the drone) the infection will slowly spread, at an increasing rate, to nearby turrets. To bring up the console, simply select an infected turret and match the sliders to obtain a reward and restore all infected turrets. The sliders as well as the frequency selector both turn green if the signal is properly adjusted.
It seems to me like the console to restore the turrets was not opening for you, for some reason? I understand that the mechanic itself isn't as intuitive as I would like it to be.
Additionally, you can refer to my website for more information, as it explains the various turrets in a little more detail: