Show current player standing position in VR

Bump version to `0.5`

Update to Unity version `2021.3.25f1`

Add config option for gun aim guide

Implement config options

Bump version to `0.4`

Add command line argument support

Require keyboard to start multiplayer

UI scale and height in VR multiplayer

Fix hovering above ground

VR hands in multiplayer

Multiplayer death screens

Implement deathmatch leaderboard

Deathmatch statistics

Hide some UI elements in multiplayer