Retro

Pixel-perfect sprites, chiptune-ready aesthetics, and Fibonacci mathematics that would have blown the mind of any 1980s arcade player. Defend the grid.

Unlock with Premium

Tower Arsenal

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

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

Final Boss

The classic eight-bit final boss, demanding pixel-perfect Fibonacci tower sequences to defeat.

Unlock Retro

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.