A transforming double-faced card enters the battlefield with its front face up by default, unless a spell or ability instructs you to put it onto the battlefield transformed or you cast it transformed, in which case it enters with its back face up
To enlist a creature, that creature must be untapped, it must not be attacking (even if it has vigilance), and it must have haste or have been under that attacking player's control since the beginning of their current turn
This isnt game-ending, and it barely impacts anything at all
If it wasn't already a creature type, it becomes a 0/0 robot in addition to its other types
Especially since on top of their doubling ability, they also give Legendary spells and artifacts Flash
Squash deals 6 damage to target creature or planeswalker