DualHexen/Hexen DS 0.28

Old news (May 2010) but there is a new release of HexenDS/DualHexen. Changes include:

Saving/Loading games (however savegames are not compatible with the PC version
Inventory manipulation via the touchscreen:
Touch the image of the active inventory item to use it.
Touch the empty area just to the right of the item to bring up the inventory bar.
Touch an item in the inventory bar to make it the active item.
If you have more than 7 items in inventory, select the one at the edge to scroll, then return to your inventory.
This interface could stand to be improved, but it is functional.

Altered control configuration:
A = fire
B = use (i.e. open doors)
Y = jump
X = cycle weapons
L = strafe left
R = strafe right
D-Pad = move forward/backwards, turn left/right
Touchscreen = mouselook, inventory

Newb-ish question, but how do I compile the source? I've got DevKitPro installed if anyone has a good guide?

http://gtamp.com/DS/dualhexen.php