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Mia's Happy Day was created by Mike Hommel of Hamumu Software as a memory to his long lost dog, Mia. In many ways the game has a tragic back story to his cancer suffering dog. Mia died on September 20, 2010 after fighting Lymphoma for a year. Mike Hommel decided that 50% of each payment goes to the Damon Runyon Cancer Research Foundation, and the other 50% goes to him to make up for the medication Mia had cost him.