I don't like how, when you finally solve the puzzle, you only get to look at the final solution for like a millisecond and then the screen gets covered by the menu.
Great game but I would like to be able to know what these monsters are that I am attacking. Maybe display their name (Skeleton, Goblin, etc.) when you hover over them with your mouse. Also, each item should indicate how much mana points it is worth, so you can at a glance tell if one item is more powerful than another.