I have published v0.3.0.

- Changed the enemy spawning system in battle levels to have pre-set enemies spawn instead of random ones.
- Added two new enemies: Flying Saber and Flying Missile.
- Adjusted the number of guns in Battle 3 to make it more enjoyable for all players in multiplayer mode.
- Adjusted the number of jets in Battle 4 to make it more enjoyable for all players in multiplayer mode.
- Added a prologue, which can be selected from the title menu.
- Applied post-effects, including bloom and motion blur.
- Fixed several issues:
　- Fixed a bug where the Saber (white pole) did not take damage when hitting the player.
　- Fixed an issue where the chalkboard in the tutorial was covered by the player's hand.
　- Added explanation text to the tutorial to clarify its intent.
- Fixed issues with the multiplayer mode:
　- Fixed a bug where some effects (such as explosions and sound) did not appear for local players.
- Improved game screen display:
　- Added a display for the final wave number, allowing players to know how many waves remain.