The physics is a bit wonky but works. i have to aim carefully and the cute animals flying everywhere are kinda chaotic.
Step, click to aim and shoot is the main control to launch the animals.
The buttons are just for aiming and shooting. The bubbles are actually animals, and their faces fly everywhere.
Most of the time you need to predict the wonky physics then aim a bit off to hit your target. Timing is more important then speed.
Q: What are the controls? A: Clicking to aim and shoot is stated.
Q: What is the objective? A: Not stated.
Q: What is a stated feature? A: The bubbles are animals.
Q: What is the main mechanic? A: Aiming and shooting bubbles.