Second Demo (v0.6)

Hello!
Our game was updated in the advent of DD50 (AGDG showcase).

Changelog:

- Separated into 3 difficulties
- Added Rosemary
- Added new shot types
- Added original OST by @xiwangchan
- Added functional options menu
- Added more complex boss spells
- Added more polishing on menus and loading times

The next update (or 2) should make the game complete, by adding the lasts 3-4 levels and remaining features (TBD).

We hope you enjoy it!