Tap through the challenges. Some you'll figure out by doing — you haven't built this yet, and that's the point. Aim for 7–10 minutes.
Challenge 1 · Coordinate Hunt
Tap the screen to hit the target
Target: tap the corner where (0, 0) lives.
tap the grid…
Challenge 2 · Tilt the Phone
Feel the accelerometer
Tap the arrows to tilt. Watch the two numbers change — that's what the sensor "feels."
xAccel: 0.0
yAccel: 0.0
Now tilt hard to the RIGHT, then answer:
Which value changed the most?
Challenge 3 · Predict the Code
What will the face do?
These blocks run every time the sensor changes. Make your best prediction — no wrong answers here.
when AccelerometerSensor1 . AccelerationChanged
set Happy . X to ( Happy.X − xAccel × 3 )
set Happy . Y to ( Happy.Y + yAccel × 3 )
Challenge 4 · Word Hunch
What does "initialize" mean?
You'll see this word a lot today. In your own words, take a guess:
Or tap the closest hunch:
Done!
Nice — brain warmed up. 🧠⚡
Here's your answer log. Copy it and drop it where Mr. Babb asks, then start the lesson.
Watch for: on a screen Y grows downward, tilting sideways moves xAccel, and you'll learn exactly what initialize means in Section 4.