You know 2048. This time the tiles are elements.

Two hydrogens meet and become helium. Two heliums, carbon. And upward from there:

H → He → C → O → Ne → Mg → Si → Fe

Iron is the wall. Real stars stop fusing there too — it is the most stable nucleus

there is. To get past it you have to go radioactive: radium, then uranium. Reach

uranium and you win.

But radioactive means unstable. Every radium and uranium tile carries its own

half-life and counts down on the board. Leave one unfused for too long and it

decays, splitting into two tiles of the element below. The higher you climb, the

less time you get.

■ Chemistry, not just fusion

Sometimes hydrogen hitting oxygen gives you a drop of water instead of the usual

merge. Carbon and oxygen sometimes give CO₂. These never sit on the board — they

go into your inventory, to be spent when you need them:

• Water (H₂O) — resets a radioactive tile's decay clock to zero

• CO₂ — erases any tile you aim it at

■ Tokens

Those reactions are a matter of chance. Spend a token and you force one: better

odds, bonus points. How many tokens each run gives you depends on your best score,

so playing better today means more room to work with tomorrow.

■ No forced ads

Nothing interrupts a run. Every video is one you chose to watch in exchange for

coins, and coins come from playing. Paying only makes it faster.

■ Fully offline

Runs with no internet. Under 4 MB.