Hey, thank you very much for your feedback :D
You're right, adding a sound when you jump on one of the characters could have been funny. I didn't have time to fix all the problems of collision with the character, maybe that's what you mentioned, I'll check !
For the orange level, in fact you have to press the escape key and click on the restart button otherwise the platforms do not reappear :o It's something I'm going to change in the post-jam version.