This is a nice concept, i like the ability to grapple, what isnt so nice is that you can get stuck in a tree every so often, i think making it so the player can jump and shoot along with the ability to grapple all at once would be much nicer, the level is a tad too dark and your flashlight does not help all that much, I would suggest making it a differently lit environment, maybe some basic torch posts scattered around, the gloomyness makes it hard to destinguish the mass of the enemy, its hard to tell sometimes how far things really are, its a good idea though, just needs some polish and youll be golden! Keep it up and make sure to keep having fun! :)