Woah, you're experience is so interesting . So you didn't know how to shoot because you didn't encouter the shooting tutoriel or just because you didn't like the controls ? hodling the button to grab walls was intended for hard platforming segment but that was scrapted because of lack of time and just left the holding instead of toggling. I made the mini boss projectiles smaller to be able to cheese it the way you did , I like to give the player a chance to discover little things like this or how you can just skip it. So am actually glad that you fond that.
and Thank you SO MUCH for your feedback .