The Basics

Draw lines so that the water falls from the tap into the glass.

Difficulty

Early on levels are very easy.

Variation

There is quite some variation in the puzzle levels, each forms their own challenge.

Visually

Visually very basic, but the style they use works well for drawing the lines.

Free vs Paid

Feature complete, but you are spending more time watching and clicking through ads than playing the game (and even playing the game is for a part just watching how your solution works out).

Is It Any Good?

I give Happy Glass 6 out of 10 stars. Original game, but too much time watching ads vs playing.