Basic explanation of platformer rules.

• Collide - To make sure that the player one actor would not fall through the floor, I had to put a a collision rule when player one comes into contact with the ground. 
• Gravity - I put the player one actor above the ground so that when I preview the game, the actor will fall down. This is because of the accelerate rule I added that causes the actor to always fall down unless something stops it.
• Controls - The jumping mechanic was done by moving the actor upwards with the press of the spacebar but to ensure the player couldn't jump infinitely, I added a rule that only allows the jump if the actor is touching the ground.