It's a top down scrolling shootem up game in the tradition of great games such as Raiden and B29 Assault!
Stay aggressive and use your special attacks as much as you can. Be sure to destroy enemy bullets with your special attacks and collect as many power ups as you can.
Make sure you use your Ultimate attack to destroy all enemies on the screen and HEAL yourself as often as possible.
Hints:
Use your special attacks!! Your sword and torpedo special attacks are critical for you to deal damage.
The crossbows are great for clearing out small enemies NOT large enemies. Upgrading and using your special attacks is the spirit of the game and is what makes it unique. ENJOY!
Leveling up the crossbows is still important though. Small enemies gain more health in later levels. Also your crossbow spread increases drastically as it evolves as well as attack speed. This goes great when collecting damage power ups. You can wreck the battlefield!