Bugfix

Hi !

I've tried various actions to resolve the white screen issue that some players are encountering.

(Since I can't reproduce this issue, I'm making fixes blindly)

So, I have :

• Reimported all the sprites.
• Removed all compression.
• Updated the Godot engine (from 4.2 to 4.3).
• Changed some source code (mainly scene loading).

I hope the white screen issue is resolved because I'm out of ideas.

I've also fixed an issue where shooting didn't kill insects in the shooting mission.

Additionally, I've added a save reset button (as it was requested)