Are you sure you're pushing far away from the character? The strength of the jump depends on the distance of the tapping point to the character. And don't forget that you can see in advance where the food will fall from. 
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Oh, that's how it works.
I managed to finish all 3 levels!
Regardless of the scatological theme the mechanics are actually quite good. Growing is fun and hints from where the food is coming from are quite useful. I really liked how each level changed a gameplay a bit so you need to use different tactics to get out of the pit.
I still feel the character could be a bit more agile, but all in all it's quite good.