Add this to your dmenu.cfg:
MenuItem Frontier
{
Icon = "res/games/frontier.png"
Name = "Frontier"
Executable = "./frontier"
WorkDir = "/usr/local/games/frontier"
}
and edit the Icon and WorkDir according to where the files are stored on your SD. Same goes for Super Methane Brothers
 and any other app for Dingux.
 and any other app for Dingux. 




