Complex sentence: He had previously applied his design ideas to the 1987 graphic adventure title "Maniac Mansion", but committed a number of mistakes during development, such as dead end situations that prevented the player from completing the game and poorly implemented triggers for cutscenes.
Split into simpler sentences: He had previously applied his design ideas to the 1987 graphic adventure title "Maniac Mansion", but committed a number of mistakes during development. For example, dead end situations that prevented the player from completing the game and poorly implemented triggers for cutscenes.