Floor Is Lava: Developer Diary | First APK Build and Ghost Race Multiplayer (June 1, 2026)

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Monday, June 1, 2026; approx. 9:10 a.m. to past 10:00 p.m.


Floor Is Lava app icon
Get Floor Is Lava on Google Play

Building the first APK

Up to now the game only existed as a PWA played straight from a website. Today it became an installable app: a signed APK, built with app icons, uploaded to the phone and installed. “The new section works perfectly with no bugs,” and it played well overall.

Designing multiplayer, and a ghost race

Versus mode currently only offers free CPU opponents. The plan taking shape: a shared-room versus mode where a friend joins, both players hit start, and you race together; with toggles for which modes to include (parachute, climber, cavern) and how many platforms to climb. A friends system with pending requests and an online-status indicator would sit alongside it.

Claude suggested something simpler and genuinely clever for a first pass: a ghost race. Rather than live multiplayer, a friend’s completed run; every platform, every position, exact timing; gets recorded and replayed as a ghost you race against on the same level layout. Built and tested it today: play a level on one phone, then chase the recorded ghost on another.

Friends tab shipped

By tonight the friends feature was functionally complete: send a request, it goes pending, the other person accepts, and once they’ve raced in Climber mode a ghost-race icon appears next to their name.

🎮 Game Rules Log: June 1, 2026

  • Friends system added: send/accept requests, see online status
  • Ghost Race: race a recorded replay of a friend’s best Climber-mode run on the same platform layout
  • First installable Android APK build created (icons, signing, tested on-device)

Photos from today

Floor Is Lava screenshot; 2026-06-01
Floor Is Lava screenshot; 2026-06-01
Floor Is Lava screenshot; 2026-06-01

Read what happens next in the dev diary: the next entry.

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Tuesday, June 2, 2026; approx. GP waiting room to 1:20…