Here's the graphic. I tried going with a theme of neon and vapor wave, incorporating details that are reminiscent of the 90s.

And a T-shirt Mockup...

That's it! I think it turned out pretty well. Again, I wanted to try and be reminiscent of the 90s, so I stuck with my bright pinks and turquoises. There is also the triangle design, which is stereotypically 90s, that I thought would go with the lines that frame the tiger.