Stop enemies reaching your crystal. Each one that leaks costs ❤️ lives (tougher enemies cost more), and a 💀 boss reaching it ends the run instantly. Survive 15 waves to win — or play Endless.

Pick a unit from the bar at the bottom, then click a grass tile to place it (costs 💰 money). Money comes from kills and clearing waves. You can't build on the path, on rocks, or on an occupied tile.

Drag a tower onto another of the same type and level to fuse them into one tower a level higher. Merging makes you stronger and frees up space (two towers become one).

Click a placed tower to upgrade it with money, change who it shoots (First / Last / Strongest / Closest), or sell it.

You can place up to 12 cheap towers and 8 strong ones (the HUD shows the cap for your selected tower). Merging helps you stay under it.

Powerful unique units (gold outline). You can place one hero per match. Your Captain is free — unlock and upgrade mightier heroes in the Store.

Before battle, choose your loadout: up to 5 towers + 1 hero. Only your deck appears in the build bar. Your deck locks once round 1 starts — set it up first!

An optional mode (pick it on the title screen). Instead of placing towers, you spend mana (refills over time) to summon a random unit from your deck onto the board. You can't choose what you get — so merging becomes the whole game. Great if you love the merge puzzle!

Earn 5–10 coins per match (more on harder difficulties). Spend them in the Store to unlock new towers/heroes and permanently upgrade heroes.

Press Start Wave (or toggle Auto). A boss arrives every 5th wave, and some waves get a modifier (Armored, Swift, Horde, Tough).

Use ◀ ▶ to rotate, ＋ － to zoom, ⟲ to reset. Press Esc to pause.