Is it necessary to give credit to resources (such as tutorials or example code) used if they are not used exactly as the example was and adapted heavily? If so, where should I write this information?

Hello! I would like a clarification on what is classified as “us[ing] open source software:” Is using an Apple template as the base of the playground “us[ing] open source?” Is using small snippets from online documentation/tutorials/references but editing and adapting them to fit your needs “us[ing] open source?” Thank you!

Hello! My playground on iPad is working properly but is 88.7 MB uncompressed and 73 MB compressed. I used Sonic Create as the initial template but it is minimally used. I even tried deleting all of my code but the size remained constant. I am not sure what to do. If I left it at 73 MB compressed, would my project be scored? Is there a way to delete all of what comes with the template except for what is used?