It was a clever use of the Pull and Push theme, I enjoyed the out of the box thinking.
Satisfying feedback from the dogs when you pet them, maybe it could “randomly” change pitch based on the dog?
On the gameplay side, it made me smile because of the cute dogs, although it could have used some simple variation like going up and down faster as the wave increased!
Overall a good base and good job for 3 (4 :P) hours!