v0.30 was published.
From now on, I will modify textures and adjust difficulty and publish it as v1.0.0.

Changes of v0.30 are below.

- Enemy drops items.
- Add aim-assist for gamepad control.
- Shutters will be closed automatically when player go through it.
- Decrease the load of CPU and GPU.
- Changed textures.

Now you can play Hard mode.
Please try it if you cleared Normal mode.