Now the achievements are in function. Sorry about the bug, download the new version and it will work right away.
It can happen that the missions achievements cannot be unlocked because the missions are already finished, in that case for the time being can only be achieved restarting the game (that can be done deleting the aacasmlle.bin on the username\AppData\Local\Snake_Eyes_Dungeon folder).
We are working on a fix for those that do not want to start again (and also a button to restart the game).
Thanks a lot!