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Stage 8: Spinning KillBricks + timing

Course progressStage 8 of 10
~35 min
Before you start

Make sure the rolling rocks have a fair rhythm.

Build

a spinning SweepArm over a gap

Learn

how speed changes the feeling of a timing challenge

Ship

a spinner stage that is exciting, not impossible

The big idea​

Timing obstacles are fun when the player can predict them. The SweepArm should move steadily so players can choose when to cross.

New words
rotation
turning around a center point
timing
choosing the right moment to move
tune
change a number until the game feels right

Build it​

Step 1 — Build the path and arm​

Build this part

SpinPath

Block
Open recipe
Size
20 × 1 × 12
Color
Medium blue
Material
Plastic
Anchored
✓ Yes

Build a far exit platform across a gap.

Build this part

SweepArm

Block
Open recipe
Size
28 × 1 × 2
Color
Really red
Material
Neon
Anchored
✓ Yes
Place
Centered over the gap between SpinPath and the exit

Step 2 — Spin the arm​

Insert a Script inside SweepArm:

local arm = script.Parent
local SPIN_SPEED = 35

while true do
	arm.Orientation = arm.Orientation + Vector3.new(0, SPIN_SPEED * 0.03, 0)
	task.wait(0.03)
end

Press Play and watch the arm. Tune SPIN_SPEED until players can cross with good timing.

Step 3 — Add the Stage 9 checkpoint​

Place the Stage 9 SpawnLocation after the spinner. Add StageNumber = 9 and the matching Team.

Understand it​

The script turns the arm a tiny amount, waits, and repeats. Small repeated changes can make a game feel alive.

Try this​

Learning beat

Try this

Three short experiments. Predict before you run, then test your guess.

Predict first

What happens if SPIN_SPEED changes from 35 to 90?

Compare

Find a speed that is tense but still fair.

Connect

Where else could a repeated tiny change animate your game?

Test your stage​

  • SweepArm spins steadily.
  • Players can cross with timing.
  • The speed feels fair.
  • Stage 9 checkpoint works.

If it breaks​

  • The arm does not move. Check the Script is inside SweepArm.
  • The arm is too fast. Lower SPIN_SPEED.
  • The gap is too wide. Move the exit platform closer.
Coach demo

This is a good place to describe the VR fantasy: "Imagine grabbing the arm and riding it across." Keep that as a demo idea, not required student code.