Hello, thank you so much for playing the demo and giving us your valuable feedback!
We just released v0.7.261 demo hotfix, including

Bug Fixes

• Fixed an issue where unintended values were being applied to certain things like enemy health and sound effect playback speed, resulting in super-tanky enemies and noise-like sound effects. This was mainly happening in French, German, and other specific regions.
• Fixed an issue where default weapons (wings) were unintentionally duplicated when switching save slots.
• Fixed an issue that under certain conditions, the number of items dropped by death would be greater than the number of items you had.
• Fixed an issue that ascending/descending stops working in certain cases.

Minor Changes & QoL improvements

• Updated the game engine to the latest version
• Added motion blur intensity to the option screen. (set 0 to turn motion blur off)
• You can now assign Ctrl, Alt, and other modifier keys to actions using the key mapping feature.
• ESC, Start (gamepad) and other specific keys should now be ignored.
• Tweaked the timings for the fast traveling tutorial
• The function to switch the lock-on target by camera input when using mouse & keyboard input has been disabled by default. Dev Note: This feature was not useful for the majority of mouse & keyboard users. If you prefer to keep this feature, turn on the function in the options menu.

Balance Changes

• Increased damage modifier to Guedu vulnerable spots to 1.4 from 1.2
• Increased base damage of Guedu charge attack to 60 from 50 Dev Note: To avoid the fight with Guedu becoming too long, we have increased the benefit of attacking their vulnerable spots where the risk is high but more rewarding. The Rush Bite, which is easy to avoid, has had its damage increased to keep them threatening.

We have also updated the game engine to the latest version with this update. This has required repackaging existing data, making the size of the patch larger than usual. Thank you for your understanding.

We really appreciate your feedback. We look forward to hearing your thoughts!