Plong is really cute! Great job with the character design and animations! The backgrounds are also nice, the mountains in the background really sell the hell atmosphere! I like that you put in the effort of adding in the sound effects and even a menu :)
For the gameplay I was a bit confused at first as a normal jump wasn't enough to get on the first platfom. I then noticed that you have to jump again when you're at the side of an object but that feels quite unintuitive to me. I think it would be nicer if all platforms could be reached with a normal jump. And I wasn't sure what the difference between the scrolls and the colorful balls is. But that's just a minor thing