Thank you for feedback.
Dark themed enemies are purple so they should be easily distinguishable after you see them.
We like it being so zoomed in but thank you for feedback. We could've added option for that.
The towers can still do damage(but rarly and only a little bit) when hitting differently themed enemies that's why we've decided to play sounds, but I agree that we shouldn't have.( you can turn down sfx volume in options to make it quieter).
And we know that you'll rarly win with full health that's why you get the same reward for winning, no matter the amount of hearts.
Again thank you for playing and feedback