This has a lot of potential and I've had some fun, but I've also found some bugs:
Sometimes the spellcasting area requires you to pick a different spell and come back to the original in order for it to recognize the pattern.
The Grimoire Spell-Engine will sometimes just randomly make it so that you can't see any glyphs when you click on Manifest Glyph - I've tried saving and refreshing the page, but the only thing I know works is resetting the game.