Short facts:

- 6 Stages
- 4 Game modes: Novice/Original/Maniac/Omake
- Elaborate scoring systems
- 40+ Fully animated CGI enemies
- 7+ Huge fully animated boss enemies
- 3D scrolling CGI backgrounds
- Constant 60 fps
- Difficulty rank system

EX Version specific changes:

- First port based on the arcade original with all graphics and animations intact.
- Added stage and boss select for training
- Added full autofire
- Normalized diagonal player movement
- Improved button priority between shot modes (FRONT,LASER,BACK,AUTO)
- Increased player fast strike shield endurance
- Improved background contrasts
- Added additional background layer graphics
- 32 bit like graphic updates
- hundreds of small fixes