I just had this strange idea...
What if you could somehow take control of some of the bosses and use their weapons to fight other bosses?
I think I got the idea from Darius Gaiden. Watch how the player takes over the giant fish robot.
http://www.youtube.com/watch?v=3eS8is560Fk&t=58s
In this idea, the player is inside of the boss (somehow), and a targeting reticule appears on screen, showing where the boss is aiming.
==============Some of my Games and Ideas===========
Sky Warrior: http://www.alice.org/community/showthread.php?t=6291
Health Bars: http://www.alice.org/community/showthread.php?p=36968#post36968
Sky Warrior: Dual Force: http://www.alice.org/community/showthread.php?t=7174
Want to make your own space game? http://www.alice.org/community/showthread.php?t=6389