Hello!
First of all, thank you for playing,
I'm actually aware of that bug and still configuring out how to fix it, I just didn't expect someone will found out this quick haha, I think I'm still going to fix it because it will break some mechanic in the future,
I will add more level later and maybe I'm planning on making a bigger arena by having the camera move alongside the square later,
Thanks for your feedback, it is helpful