you have a good base here, the art and the controls are good, that is already something to be proud of!

I am not sure if there is anything to do other than to try to go up, but it would be possible to extend it with not too much trouble.

Honestly, I had no idea where I was supposed to go. Even after multiple attempts I just gradually fell to the bottom. The grappling mechanic is pretty cool but again, I'm not exactly sure how to use it. I think the game could be better with more clear instructions. Also. for some reason I couldn't hear any sound even though others have mentioned there being sound. The art style is great and with a little more work, I can definitely see the game being really fun! 

Pretty Good. the games feels a little bit slow but otherwise great!

I really enjoyed this game for the most part! The Art and SFX create a perfect atmosphere, and the mechanic of grappling onto the walls is really neat. My main issue was that the screen was just generally to small. It was hard to play with such limited space to work in. But overall it was really fun!