Fusion

🔮 Fusion

Slide them together. Watch them grow.

âš™ī¸ Settings
Movement

Slide sends every tile as far as it can go, and a new one appears anywhere. Step moves everything exactly one cell, the new tile comes off a shuffled deck, and you get to see it before you commit. Two famous games, one underneath.

Four in a line

Four the same in a row become one worth four times as much, instead of two worth double. The same total either way — but one cell instead of two, and two rungs up the ladder in a single move.

Tiles show

Pick a number and every tile carries its value, counting in 1, 2, 3, 4 or 5 — count in 3 and you get 3, 6, 12, 24, which is the same puzzle as 2, 4, 8, 16 move for move and very good practice at a times table.

Pick a shape and there are no numbers at all: the colour and the size say everything, which is the whole point of the game and the way a five-year-old plays it.

They are one choice because they cannot both be true — and because with the numbers off, what you count in makes no difference to anything you can see.

Aiming at

Leave it on ∞ and there is no finish line — the game ends when nothing can move, and the only thing to beat is your own biggest tile. Pick a number instead and you get a win to aim at; you can always carry on afterwards.

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Swipe, or use the arrow keys

Done!

👆 One thing to do

Swipe. Up, down, left or right — on a keyboard, the arrow keys. That is the whole game.

Everything on the board slides that way at once. A tap does nothing: there is nothing to tap, and a stray one should never guess which way you meant.

➕ Two the same combine

When two tiles with the same value slide into each other they become one tile worth both of them together.

Nothing is ever created and nothing is ever lost. Add up the whole board before a move and after it and you get the same number — a merge just puts it in fewer places.

In đŸ‘Ē Triples it takes three the same instead of two.

🎨 Reading a tile three ways

Every tile tells you what it is worth three times over, so you only need whichever one you can use:

🌈 Colour changes at every single step, so two tiles that are one step apart are never the same colour.

📏 Size only ever grows, and it grows fast: from the smallest tile to nearly a whole square takes twelve steps. That is where almost every game is played.

⭕ A ring means the colours have come round again. A ringed tile is always enormously bigger than the plain one of the same colour, and two rings means the third time round.

đŸ”ĸ The number, if you chose numbers. In Settings, Tiles show is one list: a number to count in, or a shape with no numbers at all.

Big numbers are shortened — 16k is 16,000-ish — and on a very small screen with a very big board some tiles show no number at all, because a number too small to read is worse than none — circles fit the most, triangles the fewest. The bar at the top always has the exact value of your biggest tile.

🧱 A new tile every move

Every move that changes something puts a new small tile on the board. A move that changes nothing is not a move at all — nothing appears, and nothing is wasted.

In Step movement the next tile comes off a shuffled deck and you can see it coming, in the corner of the bar. It lands on the side you swiped away from.

🏁 When it ends

It is over when no direction changes anything — that is the real ending in this kind of game, and it is what you get by default.

If you want a finish line as well, there is one in Settings under Aiming at: pick a tile to chase and reaching it is a win. You can stop there or carry on. Leave it on ∞ and the only thing to beat is your own biggest tile on that board, which the game remembers for you.

A full board is not over — if two neighbours match, there is still a move in it.

â†Šī¸ Undo takes back your last move, once. A mis-swipe should never be a punishment for having fingers.

💡 Stuck? 👀 Curious?

💡 shows you a good move — an arrow across the board for a moment. You get a few each game and the number left is on the bulb; a longer board gets more, because it is a longer game.

👀 hands the board to the computer and lets you watch it play. Tap it again, or just swipe, to take over whenever you like.

A watched game is never scored. Not the score, not your biggest tile — once the computer has touched a board, that board cannot set a best. It is for showing somebody how it works, not for collecting.

đŸŽ›ī¸ Nine games in one

The board is 4x4, 5x5 or 6x6. A small board is unforgiving but quick; a big one is forgiving and a long haul. Neither is the young one — it is a size, not an age.

Then Movement changes how it plays, and Counting in changes what it is called. Counting in 3 gives you 3, 6, 12, 24 — exactly the same puzzle, and your three times table for free.

🔎 What everything means

Everything the board can draw: