Core Cluster

Drop and merge puzzle
1 player
Daily challenge
Phones and computers

Core Cluster is a drop and merge puzzle that plays in the browser on phones, tablets and computers, for one player. It has a daily challenge, the same for everyone that day.

Drop minerals toward a planet's core and fuse equal pairs up nine kinds, from Grit to the Core gem. Only the five smallest, Grit to Amber, are dropped, and a run has four spins plus one per 600 points, up to six. A mineral past the ring starts a 1.5-second warning, and when it runs out the cluster breaks the ring.

Play Core Cluster

How to play

Move the mouse around the ring to aimOn a touch screen: Drag around the ring to aim
Click to drop a mineral toward the coreOn a touch screen: Let go to drop a mineral toward the core
Two of the same kind fuse into the next, bigger one
Keep the cluster inside the ring
Stuck? Spin the cluster with S or the Spin button. You have a few spins each runOn a touch screen: Stuck? Tap Spin to jostle the cluster. You have a few spins each run

The game shows these steps as you play, the first time.

Core Cluster gameplay — Core Cluster in play

Controls

Mouse aims, click drops
Arrows aim, Space drops
S spins
On a phone, drag to aim and let go to drop

Tips

Fusing pays double per tier: Flint is worth 4, Amber 32, Garnet 128 and a Core gem 512, so one big fusion outweighs dozens of small ones.
A mineral only triggers the warning once it has been in play for 1.2 seconds, so a fresh drop poking past the ring is not yet a problem.
Spins return at a rate of one per 600 points up to six in hand, and the bot in testing spends one as soon as the warning gets serious.

Which minerals are dropped?

Only the five smallest: Grit about a third of the time, Flint 30 per cent, Quartz 20, Jade 11 and Amber 5. Opal, Garnet, Sapphire and the Core gem can only be made by fusing. Drops enter from wherever you aim on the rim and fall toward the centre at 260 px/s.

What does Spin actually do?

It gives the whole cluster a sideways kick around the core, so pairs that are touching at an awkward angle or sitting just apart get jostled together. You start with four, gain one for every 600 points up to six, and the Spin button shows how many are left.

About this game

Made by Sucia in Houston, Texas. Built with AI assistance, designed and tested by Sucia. Last updated October 7, 2026. It plays in the browser on phones, tablets and computers, with no download and no sign-in; your best scores and progress stay in this browser on this device. Without a pass, every game is free for 5 minutes a game and 30 minutes a day; an Arcade pass removes the limit. How Sucia makes and tests its games.

Also by Sucia

Sucia Studio, a video editor for streamers, runs on Windows and Linux: record, cut long VODs by transcript and make Shorts. YouEdit, a video editing service for stream recordings, turns a recording into a YouTube video, Shorts, titles and the upload text, quoted in credits before it is made. Streaming on Twitch, Kick or YouTube? Sucia Live makes highlight videos and Shorts from your VOD.