Not entirely. Using an unofficial Spider-Man game that copies character designs, names, and Marvel’s intellectual property without a license is copyright infringement. However, most rights holders (Disney/Marvel) takedown commercial releases, not free fan games – but that doesn’t mean it’s “legal.”
If you decide to proceed, follow the installation guide above carefully, scan every file, and never grant the app unnecessary permissions.
If you downloaded a file ending in .apk that claims to be the game: