Nice job for a first Godot project! I'm still using Unity but plan to migrate at some point. There is a bug where red boxes can spawn into snake segments. Also, I think the 3D perspective is a bit distracting.
Yeah, fair call on the 3D, it was a holdover from before it got scoped down. I just blanked on switch the camera from perspective to orthographic, I think that would've made things easier to follow.