Move your cursor (mouse) around to move with your balloon. You want to dodge the falling hedgehogs by moving away from each of them. That's basically about it.
I made this project with no help other than pre-made scratch sprites, but no one gives enough credit to them, so I'm gonna make a whole paragraph for them XD Scratch sprites look amazing. They could probably be in the AAA tier, trust LOL. But seriously, they deserve more credit when they are used. People often think since it's built into the software, it doesn't deserve credit. This is wrong. These were probably made by some professional artists that took time and effort to make them. They know they won't get much credit, but they still do it to help kids make games without having to draw, like me. That's the joy they find. Uhhh this is getting kinda long, so I'm going to have to end this paragraph, but remember to give the scratch sprites and their artists some credit.