Demo update v0.5.1

Hi everyone!
This is a small update. I have fixed the following minor issues.

Changes in v0.5.1

1. Fixed a mistake in gamepad input settings.
2. Fixed a problem where the control mapping description was not in Japanese when the language is Japanese.

The game is currently in the final stages of development and is expected to be complete once I create the remaining few levels. I hope you can look forward to it, as I expect to be able to release it on schedule this summer.

See you soon!