Just keep chipping away ;)
Your game isnt going to lose its value even after a long period of time. Thats one of the good things about puzzle games.
I dont know what your plans for it in the future are, but with some really nice - yet simple art assets, i feel you could be looking at a sponsorship from kongregate. (Thats what im aiming for).
If your not the arty type i would be willing to negotiate some kind of arrangement for doing the art (on the basis of aiming for a kongregate sponsorship that is). You will see some of my work soon.
On another note, im sure there would be others willing to make an arrangement like that!
Keep your chin up Vladoss!