Upgrades are the only way to reach higher floors. You must balance your income between these three core stats.
The most critical stat.
Speed determines how fast you climb and run. High speed is REQUIRED to outrun Killer Bosses in the God Zones.
Cost Scaling:
Moderate → Extreme
Max upgrades cost ~1 Billion Cash.
Your fuel tank.
Every jump drains stamina. If it hits 0, you fall. You cannot reach the top of the map without massive stamina reserves.
Cost Scaling:
Logarithmic
10k -> 100k -> 1M -> 10M -> 100M
Efficiency Multiplier.
Determines how many Brainrots you can hold per run. Higher capacity = fewer dangerous trips up the tower.
Cost Scaling:
Linear / Low
Starts at 10k. Best ROI stat.