In addition to the satisfaction of turning all those glass panes from red to green, it would be nice to have some sort of Mana reward for completing them all. Perhaps the base set of the completion of one course would suffice multiplied by 10, so completing all maps in the Easy difficulty would reward you with a 150 Mana bonus as completing one of the courses would reward you with 15, and perhaps if you're MVP/+ it would multiply the base reward that rank would normally get, by 10 as well.