GitLab

Remove tabs from 02/main.cpp

See merge request !3

Fix #6, #7 and #8 - Open window, draw and move circle + collsion example

Closes #8, #7, and #6

See merge request !1

- Still some way to go
- A lot of tunneling is happening

Update game-design-document.md

See merge request !2

- Add titles of 2 ideas
- Add links to inspiring games

- Added GDD template from Gamasutra