Add CHANGELOG.md
:bug: Disable audio on Firefox
:bug: Fix a canvas issue

ctx.drawImage cannot accept negative value on Firefox
:bug: Fix a canvas issue

canvas api hate float value on Firefox
:memo: Update README and CHANGELOG
:lipstick: Move color related code from game to color-util
:lipstick: Change name game -> simple-game
:lipstick: Change architecture. foobar-game has game-view
:yum: Add time attach game mode
:memo: Update changelog
Merge branch 'feature/time-attack-mode' into develop