So I like the concept of the idea you had going on. I also like the character model you had. Just a few things I like to share for feedback. One I felt the character could have gone just a little bit faster with his grappling hook. Just it felt really slow for him and I feel just maybe a bit more would have helped it out.  Second, maybe a warning of when some of those 3d worm appear because there were time when i was grappling one would appear right where he was and instant game over so maybe like an indication to show it appear there or so. Just kept getting a lot of expected gameover.  Interesting idea you had here. :)