I think it’s worth showing the dash cooldown for sure. But I don’t know about the time of invulnerability, maybe I’m just clicking on the dash too late or too early. Invincibility doesnot last the entire time of the dash, does it? Maybe it's worth moving the window of invincibility.
I tried dash on the second boss and recorded it frame by frame and I think I understood what the problem was. The animation is hard to read and takes 266 milliseconds before damage is dealt (for humans the average is 250 ms). Because the attack animation is not immediately recognizable, the delay in pressing the dash increases. Plus, the damage hitbox is like the entire boss model and not just the sledgehammer, so the damage is dealt even before the sledgehammer hits the player. And I don't see where the dash cooldown is, I probably tried all this on the old version. If anything, I attached a video of me trying to dodge without being distracted by shooting, maybe it will help fix it.
Yeah, the new version includes the new UI. I see what you mean, I think its 2 different approaches, you would expect the player to see the attack and be able to dodge it if you press dash quickly enough. The problem with this, since the boss will only do that one attack, if you can dodge every attack by just pressing 1 button it will be too easy. I expect the player to anticipate the attack when the boss is close. That said I appreciate your feedback and it would be totally valid for me if the boss had more different attacks. Thank you !