And Then There Were None
Minimalist art? Check!
Minimalist rules? Check!
Minimalist goals? Check!
Minimalist levels? Check!

Yes, you start with a cluttered board and have to move the pieces to cancel each other out, so that only the board remains and the “picture” becomes minimalist.
Get it here: Windows/Java
The only platform-dependent part is the LWJGL native libraries, so one could easily modify it for other platforms. I have no way of testing on them though, so I left them alone.
I was planning to add sound effects and animations as well; to make the rules easier to understand. Maybe I’ll enter a finished version in the 72-hour jam. Maybe add more levels too.