I have tried many times, even with the high tech blender. But the points earned in the final level doesn't save when I close the game and come back. I need a good strategy.
Always keep his anger at 0. When his anger is above 0, even if it's at 1, your points gain drastically decreases. So even if his anger is at 1, give him the candy right away.
All you need for a successful run is 9 scissors per round starting from the third round, and 1-2 candies per round starting from the 4th one. Other items are not needed if you are skilled enough and know some tricks. Hi-tech blender also help a lot.
Of course, it's still kinda luck based, but it is definitely possible
Also, try feeding him very quickly. this also affects the max points you can get