Great game! I love the visuals and sound, it's really polished, although something annoyed me a bit is the grapple isn't centered perfectly.
Because you are using construct and I know when the dimensions of the sprite are even, you can't center it correctly. Try adding an extra row or so. (Why was this part so detailed? It's a little thing that doesn't change gameplay at all :D)
But now the important things: Sometimes I shoot on a switch but I barely missed it. Try making the hitbox of the switches a bit bigger so that this doesn't happen.
Also, please don't make the player click on the exit if you shooted on it already. I always think "I have shooted it, next level. Wait what? Oh, I remember, I need to click on it once." Open the next level after the animation is done.
But overall, great game. I love to see more content!