What Is Brain Lines?

Brain Lines is a physics-based drawing puzzle game where you draw lines to guide a ball to its target. Each level gives you a blank canvas and a ball — sketch ramps, slides, or barriers to redirect the ball into the goal. Levels grow progressively more complex, introducing obstacles and tighter spaces that demand creative thinking.

How to Play

Click and drag on the screen to draw a line. Release to lock it in place, then watch physics take over. If the ball misses, erase your drawing and try a different angle or length. Reach the star or goal zone to clear the level. Some stages cap the number of lines you can draw, so plan before committing.

Controls

  • Click + Drag — draw a line
  • Erase / Reset — remove your drawing and retry

Tips

Shallow angles send the ball rolling further; steep angles build speed downward. Start with a single line whenever possible — simpler solutions almost always work better than complex multi-line constructions. Use the stage walls as natural redirects rather than trying to build your own deflectors from scratch.

Physics Intuition

Every line you draw is a rigid segment with mass and friction. Steep angles (greater than ~45°) cause the ball to lose energy quickly from friction; shallow angles (under ~15°) maintain speed but don't redirect well. Most successful traps combine a steep first segment for direction change and a shallow final segment for approach angle.

Ball size relative to line thickness also matters. Larger balls roll further on gentle slopes; small balls fall faster along steep descents. Most levels are tuned for a specific ball size, but exploiting mismatch can solve tricky puzzles.

Strategy

Sketch first, commit second. Many levels let you erase and retry unlimited times. Use those retries to test rough angles cheaply.

Use existing walls. The level geometry often has natural deflectors built in. Building around them saves lines and gives you more remaining lines for tricky sections.

Don't over-design. The simplest solution is almost always the right one. Multi-line Rube Goldberg machines tend to fail when the ball interacts unexpectedly.

FAQ

Q: How many lines can I draw in total?
A: It depends on the level — typically 1–5 lines per stage. Tight stages with 1 line demand perfect aim.
Q: Are there time limits?
A: No — pace doesn't matter for most stages. Only precision counts.
Q: Can I skip levels?
A: Yes — there's an "allow skip" unlock after level 20 that lets you bypass any stage for a small coin cost.
Q: Does erasing count against line limits?
A: No — line count is the number of lines you draw at the same time. Erasing a line frees that slot.

Similar Physics Puzzles

Drawing Efficiency

Brain Lines rewards minimalism. The fewest segments needed to reach the target win the highest star rating. Look for the most direct path before drawing — many puzzles have a 3-segment solution that beginners miss because they grab the obvious 5-segment route first. Stars unlock the next puzzle pack, so efficient routes matter for progression.

Physics interactions are predictable but order-dependent. Two segments drawn simultaneously behave differently than two segments drawn sequentially. Draw the segment closest to the ball first, then the redirecting segment, to avoid unintended mid-flight collisions. Avoid intersecting lines — crossed lines create unintended mid-air collisions that send the ball off-target. Plan paths that fan out, not paths that cross themselves. When you're stuck, use the undo button to redraw your path piece by piece until you identify the segment that causes the failure.

Extra FAQ

Q: Are there levels where you can draw multiple balls?
A: Yes — multi-ball puzzles appear in later levels and require coordinated timing.
Q: Can I share my solutions?
A: Some versions auto-generate a shareable replay link with your segment positions rendered as a graphic.