In order to make the game start, we have to add actions to the obj_game_starter to move between the rooms.
Open up the obj_game_starter window and add a keyboard event for the P key. We will set the score to 0 and move to the main game room when the P key is pressed. Drag in a Set Score action and follow that with a Different Room action. Fill in the boxes as shown below.
We may as well deal with the game over screen at this point in our work. Open up the obj_game_over window and do the following,
Look at the Rooms section on the left hand side of the screen. The most useful order for our rooms will be if rm_start comes first, followed by rm_game_over and finally the rm_one room. Additional levels will be added after that. You can drag the rooms into position in the list so that this is the case.