Thank you for trying it out and the feedback!
So the mouse wheel is what lets you ‘rotate’ between the spells (fire, water, lightning). But I will admit its a bit clunky and the icons were very much a last minute trying to find something (water and fire are… not great).
Maybe just literally having a button in the middle of the screen would be good (or a click triangle overlay?)
The spell charge effects used to also include what time of spell (from the tower top left) but the package was so big and out of budget on files. More optimization needed so I can properly visually indicate whats going on :/