Unity has many tools which are not part of the editor by default, but can be downloaded from the asset store, such as Cinemachine, Probuilider or the Post Processing Stack: are these allowed? I'm talking specifically about these, published by Unity Technologies: https://assetstore.unity.com/publishers/1. The ones which I plan on using are Cinemachine, Probuilder, (possibly) Post Processing Stack, and ProGrids.