Step 1: Contrast!
Step 2: Anti-alias!
Seconded.
I'd suggest using warm colours for the text, maybe orange. Also possibly a neutral colour for the HABBO stamp in the top right, since at the moment its quite distracting. I'd say green.
You might also want to consider composition more carefully. At the moment the two lines of figures amount to two horizontal lines that either lead the eye off the right of the image, or lead the eye into the slanting text, which then leads the eye off the bottom left. You need to contain the eye more with composition, imo. To this end I think the organisation of the human figures will need more dynamic introduced. Regardless, the figures in the back layer should be smaller in scale than the foreground figures. The text may also need modification to address composition. Possible texture variation across the surface to make a focus point of value nearer the inner part of the image to pull the eye back in might be something you could do, if you are set on keeping the isometric form of the text. But I would probably suggest going for broke and giving that the axe.