The point of the game is to use your grappling hook to destroy all of the bubbles on each level.
The grappling hook will stick to the top of the level for a few seconds, allowing you to move away if necessary.
Be careful though, every time you pop larger bubbles they will split into smaller and smaller bubbles.
You get points for every bubble you pop, the smaller the popped bubble, the more points you get.
Platforms that don't have ladders can be destroyed with the grappling hook.