Step 5: Ground Detection/Gravity

Next, we will make the Enemy fall when there is no ground beneath it. On every frame, a fast loop will run 4 times. On each loop, if the Enemy is not overlapping an obstacle, it will be moved down 1 pixel.

• Always

• : Change animation sequence to Ground Detector

Due to an bug in MMF2, we cannot start the loop during the same event that changes to the detector animation. We must create two separate Always events.

• On loop "Gravity"
• is overlapping a backdrop

• : Set Y position to Y( "" )+1

Each loop moves the Enemy down 1 pixel and the loop runs 4 times every frame. This means that the Enemy will fall 4 pixels per frame.