Really like the look of the game! It feels very cosy!
Do wonder if there's a way to spice up the game mechanic a bit? Maybe a laser gun with limited ammo to shoot rocks with? (Then again this is a three-hour game jam so simplicity is key haha)
Other than that, still a nice game! Got a score of 75 myself, was neat to manage the present and alien both, and the increasing challenge was good!