There should be a way to set the rotation directly on the object instead of using random rotation or lock rotation! The feature was originally just an april fools joke that turned into a real feature, but I honestly forgot how well supported it is! I will take a look at it and might just be related to 2D objects not being able to be rotated?
Can you check the advanced settings on the hammer object and maybe you can rotate it?
I will look further into this issue!