Change the pumpkin to a pumpkin emoji, keep the glow effect

Add a curse meter. Every upgrade increases the Curse Meter. If it fills, spooky bosses (Zombies, Vampires, etc.) appear as mini clicker battles you must defeat by rapid tapping.

Fix up the UI a bit, making it more polished and condensed

Move "Spooky Energy" bar up a little bit (less margin below curse bar)