I've got some new achievements implemented (with graphical assets, even)! The stats linked to these achievements should now persist through new sessions of the game - meaning you won't lose your unlocked art when you exit, for example. I've still got to make this true for the level scores and progress gates, however.
Please check out the newest build, and see if you've earned anything new :)
More refinements, tweaks, and other glorified names for bug fixes to come. Please stay tuned.