You've got the core gameplay loop, a good music and polished graphics. you have all of it to design what we call a template. Usually for a gamejam, a template can only secure you good positions as it's entirely just concepts. now you gotta work your way and create more stuff for the game. since you game is endless generation, try making a health bar and poisonous clouds, bouncy clouds, stick clouds, clouds that disappear soon after. There much room for customisation. As it stands, the game is good, but it is just one word away from great and that word makes worlds of distance. "Content." I'll add the game to collection and will wait to see what you keep up you sleeves for the future. Well done, it was a nice gaming experience!