A Platformer Game in Go

Let's try making a Platformer game with Go. 

A platformer game is a type games where characters moves on top of platforms and to achieve certain goals. 

How can we detect whether the character is stepping on the platform? You will learn the mutual interaction between the stages and characters in a game.

Also, platformer game is suitable to make a story by using stages and characters inside the game. In the game you are going to make, a hero character receives a gift from his friend and deliver it to another friend while moving on top of dropping steps. It's actually an exciting game. Enjoy it!