About Happy Glass Draw lines

Happy Glass Draw Lines puts a pencil in your hand and an empty glass on the screen. You sketch barriers, ramps and funnels to guide a stream of water into the glass until it reaches the fill line and the sad face turns happy. Each puzzle offers a blank canvas and a fixed water source; your freehand drawing determines whether the liquid splashes everywhere or lands neatly inside.

The early stages teach you the basics with straightforward layouts, but later levels hide the glass behind obstacles or place it at awkward angles that demand inventive solutions. You can draw as much or as little as you like—efficiency earns bonus stars, yet there's no single correct answer. Poki Games hosts dozens of physics puzzlers, and this one rewards experimentation because a wobbly scribble sometimes works better than a perfect geometric shape. Unlock new glass designs and pen styles as you progress, keeping the challenge fresh across hundreds of levels.