Bellow are 5 tutorials created by Steve Isaacs, an American teacher from New Jersey.
Complete these tutorials and create a simple maze game.
Maze Game Part1: GameMaker Studio- The GameMaker Interface
Maze Game Part2: GameMaker Studio- Creating Sprites, Objects, and Rooms
Maze Game Part3: Game Maker Studio- Events and Actions
Maze Game Part4: GameMaker Studio- Creating Moving Objects
Maze Game Part5: GameMaker Studio- Sounds and Backgrounds
There are many tutorials built into GameMaker and you need to explore them and complete those that will be of use to you.
They can be found under the "Tutorials" tab. Each tutorial is a .exe file and needs to be downloaded and saved onto your computer,
Completed tutorials can be found under the "Demos" tab.
Additional tutorials here...