There are several keyboard shortcuts available within the AltspaceVR client. These are being added frequently, so check back often!
ctrl-alt-m = mic mute (action button will appear red when muted)
r = reset HMD postion (helpful when you lose track of your HUD)
Push these number keys for the resulting emoji.
1 = Happy Face
2 = Sad Face
3 = Tongue out
4 = Heart
5 = Clapping
6 = Waving