When at https://play.alienworlds.io, click the "Mine" button at the top (desktop) or in the menu (mobile) to Mine.
After a short delay, you are ready to claim your mine. Click the button to claim your Trilium reward.
When you click claim, the WAX cloud wallet pop-up window will appear, asking you to sign the transaction.
And finally you can see the amount you have mined. This can vary depending on many factors like land type, tools used and planetary Trilium pot at the time. That is why we don't show a specific number here.