For the gameplay, this is too slow, not enough challenging. It was relaxing one level, boarding the 4 next
For the graphics, the character does not communicate any feeling. You don't see any anger, or guilt, or sorrow. The black outs that make the only challenge of the game should not hide the texts on the background. And the death is not indicated clearly enough (a visual flash, a time break would complete the sound jingle).
For the story, the most important. It doesn't make sense. Showing the different psychological states of acceptance is sure interesting. But only if you know the deception we're talking about. At first you think he either killed his girlfriend or killed himself. At the very end, you learn that his crime is completely different. Much more dreadful indeed, but this is not the point. And using the innocence of a child to put the focus on the guilt of an adult is a cliché. Don't use it.