The concept of having all of those kids die in the park is so... Grim (badum tss), I love it !
Maybe the strategy of running circle is a little to easy, but as I see it's your 2nd ever game jam, it's really well made !
The choice of music is good for a park, but I still feel like I'm in a random youtuber's video.
Oh, and the art style is very charming ! Especially on the title.
Overall, very good job ! I'm sure your future games will be very good !