This is my first submission to Teefury, a small project that I thought would be pretty fun to do. I was wondering what others might think about it. Any suggestions to make it better.

I've already submitted it but any additional suggestions to make it better would be great, as I plan to re-submit it now that the fonts are a little more accurate. Thanks

I've already submitted it but any additional suggestions to make it better would be great, as I plan to re-submit it now that the fonts are a little more accurate. Thanks
I'm using GIMP. I was kind of confused with the 6 color limit on the submission, so I thought anti-aliasing needed to be turned off. Doesn't it interpolate between colors? Would that add to the color limit? Sorry not only am I new to Teefury, but I'm also new to (graphic) art in general...
It'd still be great some opinions on the actual design though.
For now I've been updating it to vector graphics:
This is a low res version of the image, and I need to work on the letters, before I can consider it close to being done.
Any suggestions?
I don't mean to spam my own post but I figured I would update the image as I've made a bit of progress.
Any suggestions? Thanks.
Besides that, and a little more improving on the art style, because it still feels a tiny bit "square", I do believe this shirt could be a winner.