Add Flux::generate() method
Add class BlankFlux extends Flux & override Flux::generate()
Spawn BlankFlux 1 time of x/5
Spawn a BlankFlux in first
Add player property & moveTo() method to FluxGame
Style .player
Add keyDown event handler
Add Case::getY() method
Add Flux::getCaseAt()
Handle up, right & down key
Check if case isn't hidden before moveTo
Anime player on move
Don't move if animation isn't finish
Add .game-content & anime .game-content on move
Style .game-content
Generate flux on move
Remove invisible flux in .game-content animation callback
Add FluxGame::update() & move Flux with interval (random)
Fix error on move removed flux & fix bad placement width key right