Well, it could just be that I'm not familiar with this sort of game, but having to use two hands at once to control two different things (character and weapons) is confusing. Especially when one hand is on the keyboard and the other is the mouse. It's also hard to move when the grappling hook keeps detaching (I think because you're moving too slowly). If the hook always stayed attached until you released the mouse button, I think that would help.
The grappling hook definitely needs more refinement. The concept was to allow the player to focus on upgrading the grappling hook to make it more and more useful, but the time it attaches at the start of the game is too short, and we'll definitely use that feedback to improve the game moving forward. Thank you so much for playing, and for your feedback!