My high score is 215,810. I have NO IDEA how I scored that high. I'm playing non-stop now and I'd like to think that I'm getting more proficient, but I top out at 30,000 points usually.
Zengage is not that impressive and reminds me of those slider puzzles, which I hate, or a 2D Rubik's Cube. They put some weird effort into the presentation though, like how the menu screen is some bizarre asbstract reworking of the human digestive system. My girlfriend likes it though, so I'm glad.