First of all, the game looks really polished and the music is pretty awesome! Simple but really nice tune. The shotgun feels good and the graphics are really nice. It took me a while to figure out the best strategy to use the grapple, but I got it eventually! It was fun face blasting the bats while flying around on a shotgun xD good implementation of the limit.
Criticism:
1. the movement was a bit too slide-y, When walking on platforms I felt like I had very little control and fell off often
2. The grapple only sticks to platforms, not to the walls. This is good but it wasn't communicated in the main menu, so I was baffled for a bit why the grapple doesn't always work