Looks a little similar to something I made years ago
You didn't post any code so I have no idea what all you've actually changed from my engine besides the color of the positioning font.
All of the listed bugs I have fixed in my latest version but I have not updated the source on Google Code in a long time nor do I plan to.
Good luck, I grew tired of working on my Java Engine a long time ago and I'd love to finish it but I'm just far too busy these days.