Wow, thank you so much for the detailed feedback :)
I'll have to think about changing the default key setting you mentioned to something else. Although you can change the keys in the settings, it would be a good idea to create two presets in advance: “wasd version” and “direction key version.”
As mentioned, it seems inconvenient that the player can only equip a maximum of 4 weapons. I will also think about ways to make it more wearable and map shortcut keys that can be changed quickly.
As for the difficulty level, I intended the first chapter to be a bit easy at the beginning. I will try to balance it well by receiving various feedback.
I had no idea I would receive such detailed feedback, thank you so much!