Build a rollercoaster at the farm fair, one piece at a time. Then the goat, the pig, the sheep and the chicken ride it. If a hill is too high, the cart rolls back and their hats fall off.
Level
✓ Saved for offline use. You can also install it as an app from the browser menu.
How it works, and shortcuts
The cart starts at the top of the tower. The tower's height is the cart's height to spend. Going up a hill uses some, and coming back down gets it back.
Hills only: nothing is lost on the way, so every hill has to be lower than the tower.
Height to spend: every piece of track uses up 1 m. The signs under the track show what's left at the start of each piece. A hill has to be lower than the sign before it. Loops and pond jumps say on them how much they need.
On a budget: the tower and hills cost $1 a metre, loops $2 a metre, ponds $1 a metre, the barn $6 and flat track $1. You have $60.
Each coaster that reaches the flag scores thrill points: the tower plus every hill, loop and pond, in metres.
After a ride, Ride graph shows the cart's height and speed second by second.
Your track is saved in this browser, so you can come back to it next lesson.
Keyboard: ←→ pick a piece, ↑↓ taller or shorter, 1–5 change the piece, U undo, Enter ride, B back to building, G ride graph, F full screen, M sound, Esc this menu.