Boo Jar is a Halloween-themed drop-and-merge puzzle game set in a little candy shop after dark. Cute spooky jellies fall into a jar, and whenever two identical ones touch, they merge into a larger one. The chain runs from Candy Corn all the way up to the golden-crowned Jack-o'-King, with Eyeball, Bat, Slime, Black Cat, Mummy, Witch, Franken, Vampire, and Moon filling the steps in between — eleven Halloween pixel-art jellies in total. The tone is cozy and a little spooky, never scary, and a cute-spooky music-box soundtrack keeps the mood just right. Boo Jar runs on both phone and computer and supports seven languages.
Aim and drop jellies into the jar one at a time. Two matching jellies that touch merge into the next size up. The goal is to keep building bigger merges without letting the stack rise above the red line.
When the jar gets too crowded, Shake mixes the contents or a Bomb blasts small jellies to clear space.
If the drop-and-merge loop in Boo Jar keeps you hooked, merge games on Playgama offer a wide range of similar satisfying chain-reaction puzzles. For a fruit-flavored take on the same Suika-style dropping mechanic, Watermelon Fruit Merge Saga challenges you to plan every drop carefully in a space-limited basket. Merge Fruit Characters adds 26 unique fruit heroes, combos, and daily rewards to the physics-based merge formula. For something weirder, Mutant Mash: Merge Garden lets you drop and merge goofy fruit-animal hybrids that can mutate into Golden, Rainbow, or Glitch versions. Monster fans will enjoy Merge 2: Fluffy Monsters, a colorful 2048-style puzzle where merging identical creatures unlocks increasingly charismatic characters. The broader puzzle games category is also worth exploring for more physics-driven brain teasers.