The 1984 Commodore 64 version of Metagalactic Llamas: Battle at the Edge of Time was converted by Aaron Liddiment for Llamasoft and is pretty much the same as the classic VIC-20 original, except with better graphics and arguably better sound.
You control a llama who can ‘shoot’ diagonally (I’m guessing it’s spit) at spiders that move down toward you on their webs. There’s a horizontal line on the screen that allows you to change the angle of your shots. If you shoot a web the spider will fall to the ground, and spiders are dangerous on the ground, so you don’t want that, so you can try to shoot them before they hit the floor (they fall slowly, so it is possible). If any spiders do reach the floor you then have two options: the first is to use the wrap-around screen to confuse them, and the second is to shoot them with ricochet shots that bounce off the walls and the ceiling. It takes a little practise, but it’s a very useful tactic to have in your llama repertoire.
You can start the game at one of thirty different levels (I’m assuming difficulty levels), which increases the rate at which the spiders attack. It just gets to the point where it becomes “why bother?!” after a certain number of spiders, though. Once the higher levels start, they’re over in a matter of seconds. There’s no point to them other than as an extreme spectacle.
Metagalactic Llamas is an okay game on the C64. It doesn’t have the sheer ‘oomph‘ that the VIC-20 version has.