Created class Event to inform player about collisions of avatar, and sprites created by the avatar, with other sprites in the game. Added functionaity to allow player to draw on screen during game. StateObservation interface now allows the player to query for sprites created by the avatar and for the history of events happened during the game up to that point. It also allows for querying for the block size and world dimensions. Bug fix: lastrect Rectange from VGDLSprite references problem solved.