I thought i should reply here too, after i did by all those other comments... but tbh im not sure what to say ... mhhh maybe - Gratz for your achievment?!
Under rating threshold (hideshow)
Enjoyable music, great game. Would like to be able to view achievements without losing my current game, and a level select might be nice for casual play.
The ingame space is pretty tight - normaly there is some mochi-stuff above the stones, but i disabled them on kongregate, but i agree, getting the possibility to check the achievements ingame would be nice (will think about it).
Concerning the level select, this would undermine the highscore system a bit. Because the higher the level the higher your "base-score" per stone -- and there are achievements for reaching specific levels. It could be possible the allow a player to get "back" to his max-level he had reached before. Need to sleep/think about that too :)