Good, but try removing those annoying chokepoints
The game was really challenging. It really makes you wanna finish each level and eventually the entire game (yes all 30 levels). The challenge factor makes the game really fun and addictive. In short it was really good... well it was ALMOST perfect...
Here's why:
1. As we can all see, some levels were pretty hard... harder than they should be. I noticed a few "chokepoint" levels where a lot of people get stuck. Like for example, lvls. 10-14 was fairly challenging yet when it comes to lvl. 15, the difficulty factor drastically increases and becomes a bit too hard to figure out for the average player like me. Then after finishing that level, 16-20 was almost a breeze with perhaps an average of 1-2 tries per level. The question is, why not move lvl. 15 in a much higher level? Why put levels with much harder difficulty ratings in between easier ones? It could be somewhat annoying you know.
2. I agree that even if music and sounds aren't really major factors in the game, it wouldn't hurt to add a few good sound effects and background music. It is said that music afterall inspires and stimulates the mind. You'll never know when "inspirational" music can be useful in this game.
3. You could try adding a bit more levels beyond 30 or maybe perhaps bonus levels, the addiction factor really kicks in even after finishing the game. I was definitely (and desperately) looking for more!
Good game.