For playing game checkout: https://scratch.mit.edu/projects/1224050177/ Left and right arrow keys to change the pages. Sorry to say this whole thing has only the logic but no code. You yourself have to figure out the code using the logic.
Musics from pixabay. Made by srijon12 himself. NOTE: If you learn from this project and make a similar platformer like this, you need to give me credit or else it will be reported.