Very good
It's an excellent brain teaser with a very relaxing atmosphere.
Some people complain about the originality, but the execution is really good. I've seen scores of 0 for this. Where's the problem? Many games on NG remake old concepts. It's almost a tradition!
Good style, the graphics are top notch, the music is soothing. Overall creating a good way to keep the harder puzzles from being annoying. Even the soft sound of the moving blocks is calming.
Relatively easy control. I overshoot quite often, which is annoying. A highlight way to show the cursor location might be a good upgrade. Other than that, very intuitive.
No bugs. Keeps track of your stats, allowing for some replayability.
Personally, I think the game is good as is. If you leave it alone it's still a great puzzle game that many people will enjoy. However, I've seen many complaints. I think most are because this just wasn't a type of game for them. (doesn't make it bad) In any case, here's how I would tackle some of those issues, if I were inclined.
compaints I've seen:
"bad control" fix: highlight cursor space
"boring"
fixes:
Add alternate musicalternate themes for graphics.
Add a simple storyline.
Add a goal, give incentive to complete all the levels.
Add rewards for each level completed.
Add medals for completing within certain moves/time.
"too hard"
break levels down into three groups. easy medium hard.
Keep up the good work!