I have purchased Minecraft and I only can get the Launcher. Why cannot download the whole game?

Put the summary of the bug you're having here

What I expected to happen was...:
Getting the game from your website

What actually happened was...:
Having a Launcher

Steps to Reproduce:
1. I login
2. I click on PLAY GAME
3. A CRASH REPORT appears on screen
4. I click on REPORT TO MOJANG
5. This screen has appeared