Kernel Hearts Floors - Tower of Babel
The floors of the Tower of Babel in the Kernel Hearts game in unlock order, with what to do and what awaits on each.
Quick Answer: How Many Floors Are There?
Two at launch: The Outer Gates (Floor 1, open from the start) and The Heavenly Courtyard (Floor 2, sealed until you defeat the Floor 1 Guardian and take its Floor Access Key). The tower above Floor 2 stays sealed — future content climbs higher. The tower progression guide walks the unlock order gate by gate.
Here from a "how many floors" search? Short answer: 2 floors, 2 guardians, roughly 6-8 hours to clear both.
Two Floors, One Difficulty Curve
The Outer Gates is the classroom and The Heavenly Courtyard is the exam. The Gates hand you every tool one at a time; the Courtyard assumes you carry healing items, upgraded chips and the habit of reading telegraphs. The comparison table on the region comparison page breaks the differences down number by number.
You can return to Floor 1 at any time — the hub laboratory still buys Floor 2 drops at full value, and the fast-trip gate opens both ways once you have the Key.