I suggest having graphic icons for them. The Achievements is one of the exciting side features to the game, but right now it seems to be kind of plain.
Some of PPD players can make good graphics, so maybe you can ask them, or have a contest?
Also, can you add a feature to view your level and achievements (and sum of score too, if possible) in the game itself and not only on the site? It's just easier to keep track of things that way.

Agree. Or at least make it easier to see on the web, like a "Stats" sub-menu in our respective profile page.

If someone make graphics for achievements, i will import them...

OK, I will add Stats page in mypage.

Yay! Send me the achievement list and the resolution you want to be every image and I could do the graphics ^^