For a first game this is really well made! Congrats!
I think the game starts of really hard. Took me a long time to figure out how to use the logs to get past the first level. Second level was even harder. The grappling mechanic is good but it needs some tweaking. Slowly moving towards the grappling point makes it a bit unpredictable and hard to control. I feel keeping a fixed distance and just swinging might work better and make it more controllable, especially when swinging from one grappling point to another.