Goblin mulligans badly
The deck also features a ton of different creatures with anthem effects for your zombies, which can make your zombie army and tokens incredibly powerful (for example Cemetery Reaper, Death Baron, Tomb Tyrant, Lord of the Accursed, Bladestitched Skaab, and more) to easily overwhelm your opponents
"How to play Magic: The Gathering your beginner's guide to mana, cards, and combat"
Jill, Shivas Dominant / Shiva, Warden of Ice Exclusion Mage baseline + a powerful flip mode make Jill, Shiva's Dominant a great card for any deck
As you can see from just these few examples, what the Tinker Time deck really wants to do is create as many tokens as possible of various forms, use them for their abilities (don't be precious about your treasure tokens), and overwhelm your opponents with a barrage of attacks