Roblu Arcade

Puzzle minigame

Blob Trap

Trap the bouncing blobs by drawing walls around them.

▶ Play Blob Trap — free, no install

Free · plays in the browser on phone or desktop · no account

Blobs ricochet around an open stage, and your job is to wall them off from each other until every single one is alone. Draw a short stroke anywhere and it extends in both directions into a full wall — stopping at the stage edge or the first wall it meets.

The danger is the moment of construction: while a wall is still extending, a blob touching its path breaks it and costs you a life. Finished walls are safe — blobs just bounce off them, sealed into ever-smaller rooms.

How to play

  1. Drag a short line — on release it extends both ways into a full wall.
  2. A blob touching a wall while it’s still extending breaks it and costs a life.
  3. Separate every blob from every other blob before the 18 seconds end.

Modes & difficulty

Easy is three blobs (three pairs to separate) with four lives. Medium is four blobs and six pairs; Hard is five blobs — ten pairs — at higher speed with three lives. The walls extend at the same speed regardless, so crowded stages demand better timing, not faster fingers.

One tip

Draw where the blobs aren’t and let the wall grow into place — a stroke in empty space just behind a blob that’s moving away is nearly risk-free. Cut the stage in half first; two small problems are easier than one big one.

More games

Paint Percent · Laser Link — or browse all minigames.

▶ Play Blob Trap — free, no install