Really like the weight to the movement but it could use a little more control. Easier said than done though.
Grapple hook felt fantastic but for me at least I am not very good at precise clicking so the power lines made it a little tricky.
Being able to infinitely jump up walls was super fun for me. I can see it breaking some puzzles.
Honestly great experience, all of my nit picks are small potatoes and the fact you made it 72 hours is very impressive.