Pick a tower → click the map to build · upgrade its forks (only ONE hits ★ MAX) · a 🫧 teal glow means a tower can fuse with a neighbour into something secret · Send Wave skips ahead for bonus · Space = pause
🫧 Bubble Tower Defense
💎 0 Bubble Cores
Difficulty
Choose a map
🔬 Upgrade Lab
💎 0
Permanent upgrades. You earn 💎 Bubble Cores every run — win or lose. Spend them here; they stay forever, so every run makes the next one stronger.
📖 Fusion Codex
Place two compatible towers side-by-side and fuse them to discover hidden fusions. Each one you find is recorded here — the rest stay a mystery until you brew them.