I think you're on the right track with this mechanic.
I want to add that maybe you can change the difficulty of the QTE at certain times: making it more difficult when the enemy is "scarier/stronger/more observant" or when the hiding spot is more risky (among bugs or trinkets). Also, since some people are bad with QTE, maybe add the option to simply hold down certain buttons, in the future of course.
Just wondering, were you considering the idea of self-moving platforms, like a conveyor belt?
I wish you well and good luck!