I’m not trying to charge the jump beforehand and have them jump on release. Consider Super Mario Brothers: A quick tap of the jump button will make Mario jump only slightly, but a longer press will have him jump higher until he reaches the maximum. This charging and releasing system isn’t exactly what I was going for, but I suppose it will have to do for now. I’ll see what I can do with it.
In the meanwhile, are there any other methods that someone could suggest?