Velocity.x and y are outdated. (mono)

[nviprod]

Which demo project is affected:
Dodge The Creeps and other mono projects, like Pong.

OS/device including version:
Windows 11 Home

Issue description:
Putting in the code itself will give you a 'Vector2' does not contain a definition for 'y' error. Godot 4 requires you to capitalize the X and Y in velocity.X and velocity.Y

[Calinou]

Thanks for the report! Consolidating in #697.