Physics is key here. i found the roller truck is used to smooth out the roads. You must click on the roller and drag it over the bumpy paths to make them flat for building. This mechanic is simple but very important for the game.
Clicking starts the fun. You will operate a roller to smooth out the roads, a forklift to set up formwork and tracks, and a crane to assemble parts. Use the crane to build Ferris wheels and roller coasters, which is a cool feature. The trucks introduce themselves to you.
Often, i think about the buttons you press. Inside the game, you click on trucks to make them move and do work. You will click to place formwork, which is kinda weird anyway, and then click to assemble tracks. The trucks tell you about their functions, which is helpful.
Quick tip: i discovered that using the crane is better then using the forklift for big parts. You must click the crane button and then click on the attraction pieces to lift them. This mechanic helps you build the Ferris wheel faster. The roller truck helps with the road stuff.
Trucks are the main thingy here. You use a roller to smooth roads, a forklift to set up formwork and tracks, and a crane to assemble parts for attractions. The game has you build a railway station and an amusement park. These features make the game fun and educational.