To the best of my knowledge, algorithms are not patentable already, though there are workarounds that often get exploited.
Software is rarely similar to math algorithms in practice. Just for example, majority of the software developers I have come across have little understanding of mathematics, fundamental computer science, and often also algorithms. They just know how to invoke the latter already built in various libraries to get the problem at hand solved.
Finally, "software" by itself is not a subject of a patent, it is a subject of copyright. What is patentable is an "invention" that may be implemented in software or as a process instead of something physical.
Example, regarding "player.teleport()", it is already that way.
If you invent a teleporter, you should have patent protection. Developing a video game that implements player.teleport() (however cleverly) shouldn't be.