Amazing Game, got to Level 84!
Love the promotion system and 4 warnings mechanic.
Combat feels very satisying and the art style is awesome!
First of all - Upvoted for an Amazing Review with Very Constructive feedback!
I totally understand where you're coming from, I feel like I got abit obsessed with difficulty in general after level 2 and its part of the reason I recently added "Loser Mode" which adds checkpoints to the end and start of most of the lines of platforming.
This is my first game developed in Unity (as an excerise to get the hang of it) and it's the second game i've developed in total. The original was actually the same Game but simplified, not as pretty, not as fine tuned and coded on Game Maker Studio.
Precise Input: I spent forever fine tuning this, so I certainly appreciate that you noticed. :3
Art: I shall pass your feedback onto my friend who made the art for this game by referencing my previous game, he did a fantastic job.
Music: I love it too, its an amazing piece that doesn't get repetitive made by the amazing "DST" - Link: https://opengameart.org/content/tower-defense-theme
I hoped you enjoyed yourself, Thank you for Playing and ofcourse for your Feedback.