I LOVE this idea!! Tower defence where you set up not traps that actually damage the enemy, but that scares the enemy away! Good job!
However I think there are a few things I'd like to point to.
1. There's no damage indication. When a bunch of kids passes by a trap they receive a fraction of damage, maybe even only one of them is being damaged at a time. Understanding how the damage system works would help the player place traps more effectively.
2. I feel like there's not enough coins dropping from kids for player to efficiently update their traps. It's apparent in level 3 where no matter what your setup is you're gonna miss a few kids.
3. I couldn't figure out how to pickup and rearrange/sell existing traps. If it's not possible - this limits player's possibilities to learn and to adapt to the game.
4. Though it might be because of time constraints, there's only one map. This game just BEGS for at least a few maps.
In any case I find this a solid entry. Great work!!