It was a pretty fun combination of Doodle God and Tower Defense.
However: - And i feel pretty strongly about this - The Defense aspect of the game loop is super underwhelming in comparison to the stacking and exploring recipes.
i don't feel in control and I feel limited by the places where i can place my creatures. Also there is no real tension in whether I'm going to pass the round or not. Either I get recked and it snowballs into everything getting recked, or i just easily swipe the whole wave off the board in full speed fast forward.
also i think its a bit of a missed oportunity that you need to click the thing that you want to craft. as the came is called STACKrifice, it would be super neat if instead of clicking that button ontop of the stack instead i drag the whole stack i want to craft onto the pentagram and it gets sacrificed and i reciefe the new thing. also for animals and so forth i just drag the animal onto the pentagram and it would automatically sacrifice it... just an idea :P