Is there any way to detect collision on transparent images with any kind of shape?

is there any app/site/library or any other way to make a tilemap in a simpler way on mobile? Or a way to make maps made in NotTiled work?

I made a game to test what I learned, with a blue tank that is the player, it has a cannon and shoots when you press "1", and a red tank that follows you. The problem is that the bullet that the player shoots does not appear. I checked the entire code and didn't find what was wrong. I'll l...