Your mana base looked at Krenko and said, "good luck out there," then hid behind thirty Mountains and a dream.
The good news: this deck knows exactly what it wants to do. The bad news: everyone else at the table will know too, because your entire strategy is a giant red button labeled Make Goblins Until Someone Panics.
The engine is real. Krenko, Mob Boss plus haste and Impact Tremors can absolutely end games. But the list is still missing enough card draw that one board wipe turns your master plan into a dramatic reading of topdeck Mountain.
Add Skullclamp before your Goblins unionize. Add protection before Krenko becomes the most frequently removed employee in the command zone. And please, one or two more answers would stop Ghostly Prison from becoming your deck's final boss.
Final verdict: spicy, loud, dangerous, and one board wipe away from explaining that it was actually a casual deck the whole time.