

What it takes to Finish Slumber Shindig
Once you finish the main line (Sleepover Essentials), the final item rewards you with a birdhouse-looking thing. When you tap it, you'll get 4 locked rabbits. Building up to a rabbit takes 128 sleep masks. Finishing everything requires unlocking all 4 rabbits, or 512 more sleep masks. But even if that's not possible, unlocking one or two of the rabbits is worth it:
Unlock 1 rabbit: 128 sleep masks. Reward: 5 star dazzling pack
Unlock 2 rabbits: 256 sleep masks. Reward: Finish 2nd line (Friends Forever), which also finishes the game for 200 energy
Unlock 4 rabbits: 512 sleep masks. Reward: rainbow gem