A method for providing a game includes: providing a plurality of blocks arranged on a block map with mission information to be displayed on a screen; selecting a block, among the plurality of blocks, based on a user's input and moving the selected block; determining whether matched blocks are adjacent to or exist around a mission block relating to mission information when some blocks, among the plurality of blocks match with a deletable form according to a movement of the block; deleting the matched blocks when the matched blocks are adjacent to or exist around the mission block; and processing the mission information for the mission block.