The visual feedback in this game is amazing. Every hit feels punchy, and it goes with the intense music super well. The gameplay is very intense and fun, and I like that there's a variety of enemies.
My number one recommendation is to switch the hookshot controls from the arrows keys to the mouse. Right now, controlling player with three different inputs (WASD, arrow keys, and spacebar) is extremely difficult and can lead to some frustrating moments where your aim is a little off or you let go at the wrong time. Using the mouse to control the hookshot instead would make movement a lot more intuitive.
Great job on the game overall, I had a lot of fun. Unfortunately I couldn't beat it, but I enjoyed maneuvering around and blasting away enemies.