Foam Frontier

Hold the clean line against a steady wave of spreading stains.

Drag the foam brush across a 10 by 14 tile grid. Ordinary stains clear in one pass, while layered sticky stains need three. Every five seconds, grime spreads from its current edge in a predictable pattern. Covered drains increase the next spread, so keeping them clear matters.

Tap a dirty area to target a 3 by 3 zone, then spend a Foam Burst to clean it instantly. Additional Foam Bursts are available through an optional rewarded video on the home screen, and starting a game never requires an ad.

Keep at least 80 percent of the grid clean until the two-minute timer ends. The round ends immediately if contamination reaches 70 percent. Pause and sound controls are available throughout each portrait session.

Foam Frontier uses bright foamy tile sticker art, deterministic rules, and single-finger controls designed for phone play.