Nice game.
I second your opinion on the combat mechanics, because it was a little bit clumsy to click the mouse and keyboard together on my laptop.
When I played the game the second time, the hero died when he still has 67%.health.
Good points on accessibility, I'm so used to playing with mouse and keyboard I didn't really think of it.
About the health points, the game has 2 health bars, the player health (the red one below the player) and the gate health (the blue one with the percentage), so if either one hits 0 the game ends. So that might address the confusion with the hero dying at 67%.
Thank you for playing!