1st round: aliens destroyed me, desperately tried to protect the stones.
2nd round: bullied the alien into submission by slamming his face at the top.
The story was set with the text, not my favourite way of communicating to the player, but I really really enjoyed how you made it available for us to read if we wanted, not showing it in unskipable dialogues. +gamedev points for that!
Nice controls! Great idea! I am sure you have more on how to proceed, can't wait to see what you make, saw some nice ideas at the comments as well.