Premium Theme

Steampunk

Gears, gauges, and golden ratios. Your brass automata fire precisely calibrated steam charges at mechanized invaders. The engineers who built this city knew their Zeckendorf — do you?

Unlock with Premium

Tower Arsenal

All 8 tower tiers — each deals its Fibonacci number in damage

T1
1
dmg
T2
2
dmg
T3
3
dmg
T4
5
dmg
T5
8
dmg
T6
13
dmg
T7
21
dmg
T8
34
dmg

Enemy Waves

9 enemy tiers — HP increases with each tier, demanding more complex Fibonacci solutions

Tier 0
Tier 1
Tier 2
Tier 3
Tier 4
Tier 5
Tier 6
Tier 7
Tier 8
Boss Encounter

The Clockwork Empress

An automaton empress powered by clockwork engines. Disabling her requires a precise chain of Fibonacci impacts.

Unlock Steampunk

This theme is part of the premium unlock — along with all other themes, endless mode, and every difficulty level.

Unlock Premium

One-time purchase — unlocks all 7 themes and everything else.