I loved the swinging mechanic and the hand drawn art style looks amazing, maybe I'm just biased though because that's used for my game too :) . I struggled A LOT but that's probably just a skill issue on my part. It's really creative and fun! I think you could take this idea and put it into a full game!
My only critiques are just simple changes.
I feel like the controls are reversed but that might just be a problem for me. Just a personal preference but maybe there could be like a setting to reverse the controls so the monkey swings in the direction of where you moved the mouse?
Another problem, which is less of an issue and doesn't affect gameplay, but maybe you could find a way to differentiate the grabbable objects with the background. This isn't a major issue by any means but if done correctly, it could massively improve the feel of the game. I don't know how you could do that but maybe like by highlighting the area slightly or something?
My last real idea for it could be to add some background music to just spice of gameplay a bit.
Don't take my advice too seriously though! I had a great time playing and I hope you continue working on this game or at least use this game as an opportunity to grow and create even BETTER games!
10/10 game :)