Damn. Wanted to do a quick look and ended up playing through it all in one sitting. Combat is nice and fluid even for it's simplicity. Started as firestarter and burning through things was super fun, and the crystal system was good for giving extra spells for variety. Having the sidequests with areas outside of tower and the base-building later on is a great idea to break up the routine of the main content.
One thing to note is that gathering the pages for the skill unlock quest was a bit tedious, especially since by the time I got it I reached the floor with the lightning mages, so had to go back to farm the fire cultists for them. It would also be nice if applying fire to an enemy who's already on fire from a different source (like for example flame vial then fire wave) would reset their fire countdown - tried to confirm that currently it doesn't and seems like that's the case but not 100% sure.
But yeah solid game so far.