Thank's for the feedback! I'm happy you liked it
At first the people you save disappeared within 1 or 2 seconds, but then i thought it would be fun to make that people bounce when you hit them, it's just a detail that makes the gameplay more satisfying, and a bit harder. Also they are always moving (really slow) so they dissapear with time so there are not too many of them on screen.
I'll keep making games and i'm sure the next one will be much better.