I laughed the first time i played this, im not sure why. 4/5. Last guy was easiest, my first shot hit him right in the head and i was like... 0.o I thought it was going to be hard...
Found another.
If you fail a level as soon as the screen goes gray click and make a ball that you think will even out the weight. If you do this quick enough, the game will count it!
=P
Found a glitch/ cheat.
1.As the balls are dropping click and hold to make a large ball.
2.Use it to push all the others of the screen
3. Drop your big ball below the Scales
4. Tap lightly to make size 2-9 balls on each scale
5 You will have a 0 difference every time
Good luck and your welcome!
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