Import from the old repo.
Solve issue #5 by adding J. S. Bach's BWV147 (version by Myra Hess).
WIP on menu.
Basic menu works, but is ugly.  TODO better CSS.
WIP on making choices made in menu actually affect the game.
WIP on making the menu useful.
Solve issue #2: add a menu.
Merge branch 'feature/2-menu' into develop
Update the music.
Add energy and health sounds.
Some sounds.
Lots of new sounds + function playSound.
Solve issue #4: all sound is present.
Merge branch 'feature/4-add-sound' into develop
Solve issue #19: block health depends on length.  Also block can fall when its health is below 50% of starting health.
Solve issue #18 by spawning bullets within the bordered box.
Solve issue #20: health and energy are not drawn over now.
Solve issue #7: draw a congratulating message.
Handle player's death.
Fixed a relevant bug in menu - not all values were saved.