Kurapeka's psychic ability can be used on spiders and other creatures in battle, but the effect on other creatures may be limited or weakened.
In episode 54, Kurapeka used his telekinesis to create a virtual spider that could attack other enemies. However, if Kurapeka's telekinesis is sensed or interfered with by other people or creatures, its effect may be weakened or terminated.
Kurapeka's telekinesis could also be used to control the actions or thoughts of other creatures. For example, by controlling the minds of enemies, they could not move or attack Kurapeka.
Although Kurapeka's telekinesis could be used on spiders and other creatures, its effect on other creatures might be limited or weakened, depending on the situation.
The Hunter x Hunter manga is unfortunately not complete. The author has faced various issues that have led to intermittent breaks and an unresolved storyline.