There are several ways to do this and here is one possibility:
From https://www.scirra.com/manual/132/common-actions
[quote:34mv0gqp]Set angle toward position
Set the object's angle to face a position in the layout.
Bullet on created: set object's angle to face (player.x, player.y)
If your Bullet behavior has set angle on, your Bullet object should head toward the player right when it is created.