That screen is so beautiful. So so beautiful. That said, there appears to be some scaling artifacts in the game. Adventuron should never naturally render blurry fonts (notice the double thick line at the top of the E), so I wonder if you zoomed in with your browser?
Certainly before you release you'll need to confirm that the fonts are rendering properly.
And the image looks slightly blurry too, which again might be a browser zoom as I assume your core image is a lossless blocky PNG.
Forget all that though - this is BEAUTIFUL.