Patent problem of PAC-man image

If it is a patent, you can check whether Pac-Man has a patent in appearance and whether it is still within the validity period. If not, then there is no problem of patent infringement.

However, there may also be copyright issues. Copyright has no time limit. However, the determination of copyright is subjective. Obviously using other people's images should belong to unauthorized infringement. Of course, it doesn't matter if no one is pursuing it.