i snapped the inner tab of the tail, the tail doesn't move bull the head and feet does and it seems to be straight,

Don't download. Bad design. As others said, tail doesn't work which makes entire print broken. With tail stuck, the coaster on top doesn't move. If you break the tab of the tail off so it doesn't block, then the coaster part sits crooked and doesn't move easily.

Cute print, everything works except the tail. It prints what looks like a random rectangle in the slot where the mechanism moves.