Unlockables:
Unlock the following bonuses by performing the corresponding tasks:
BONUS – HOW TO UNLOCK
Extras 1-5 – Complete the first six galaxies.
Extreme 1 through 5 – Beat extras 1-5.
Merciless 1 through 5 – Beat extreme 1-5.
Final Galaxy – Beat the previous nine galaxies in yellow.
Credits:
Unlock the following Credits by performing the corresponding tasks:
CREDITS – HOW TO UNLOCK
Ending credits 1 – Beat the first six galaxies.
Ending credits 2 – Beat extreme 1-5.
Ending credits 3 – Beat all galaxies.