One of my favorites so far! I think the game has a great level of polish, for example with the creative way to start the game by shooting an arrow. The graphics are also very nice, and work well with the animations you added for grappling.
I also liked how you taught the player how to play with tips in the background, so I didn't have to explicitly go through a tutorial! Overall, a lot of fun. I spent far too long trying to get all stealth kills on Lvl 1. haha