-Added lives.

-Added continues.

-Added music to game over screen.

-Chained stage 1 and stage 2. Replaced stage select with a "game start" button. It is still accessible in debug mode.

-Made some enemies in stage 2 drop power.

-Capped power at 2.

-Added transition animation between stages.

-Changed stage 1 background.

-Bug: fixed the score increasing if you hit an enemy before the game over screen reached the success flag.

-Bug: fixed double-free.