How do I swap to different spells on PC, Google says to use the F keys but they don't work.

I have beaten Melvin, Oberon, and William, yet only Melvin's Abyss portal is opening. Any idea how to fix?

That is all

Hey, after many years I wanted to play this nice little game again and now facing the same problem as allready many player reported: While using Keyboard and Mouse controls, mouse buttons very often get stuck, so using sweeping correctly is nearly impossible and minions often get sent or recalled when you don't really want it. This way you can still do some basic fighting, but as soon as you have to do some more complex tasks where proper leading of your minions is needed, it's just frustrating as hell. ...

title. I guess instant kill would be a second choice to kill beetles faster.