Everything you mentioned is true. I’m still balancing things and working on a proper tutorial for the game.
The gray bar is a stun meter — when it fills up, the enemy gets stunned for a few seconds.
After defeating the boss, you’ll gain their weapon and abilities.
Regarding the skills, I agree with your feedback about the spinning attack — it does feel a bit off right now, and I’ll improve it based on what you said.
Thank you very much for the feedback, it really helps a lot!