It is what it is.
For what the author was going for, this game is perfect. The only next step would be costumes for our little sumo balls, different music, and backgrounds, but all that is added flavor. I've been playing this game for months now. Not nonstop, but I come back every now and then.
If your finding that the AI is stacked to one ball, then maybe it is because you don't have computer 1, computer 2, and computer 3. Maybe it is because you have three computers, and one is difficulty 1, another is 2, and the last is 3, the third ball falling on yellow if you take the first one, the red one. Hmmmm....