go to official Galxe link to enter B3 testnet: join.b3.fun/?campaign=galxe
once there, start playing by:
creating a B3 profile with the same wallet you use on Galxe
minting your avatar on join.b3.fun/avatars
playing PewPew Tap to earn testnet $Pewpew
Get 33 Points
Earn testnet $pewpew