Thank you for your time playing my game and the feedback aswell!
You're not the first telling me that, but I don't know, I'm really confident about is not appearing out of the viewport, so maybe it's appearing behind a lot of sprites and I didn't had so much time to polish that, especially with the purple pig at round 20.
Anyway, thank you for the feedback, I'm gonna check it and I'm gonna enable the full screen if that helps in any way :D