Authored by Jeffrey Soldan (aka Drakonite), the game is expected to be reminiscent of the game Bejeweled.
The goal of Meltdown is to drag rows and columns of reactor cores (yes, those circles on the screen) and group them by color in order to destroy them.
To play the game, you can move the cursor around the screen using either the d-pad or the analog stick.
Once you have found a point that you wish to move rows or columns, just hold X and then while holding, move the d-pad or analog stick either vertically or horizontally, depending on the best way which you see fit to group cores of the same color in threes or more.
In the readme file included in the download, the author wishes to thank adresd, Bryan, John_K, MrMr[iCE], Optimax, Skitchen, TyRaNiD, and [vEX].