infinte, to a certain extent. eventually, if you were at like level 10 billion, you would run out of CPU space but I can assure you, you probably won't reach a high enough level to fill your CPU.
The code makes new platforms juts above you so the higher you are, the higher the platforms will spawn.
you go to the middle where there are a few blue platforms. you jump on them. as you (the player) go upwards, more platforms spawn. you just do parkour from platform to platform.