I have just uploaded an update (mokomaze_0.5.5-maemo2) to extras-devel. By default screen dimming will be disabled during the game (there is an config entry to control that).

Also default delay between frames is now 0 because of SDL not being accurate in timing related functions. This makes it run even smoother. The delay is also controlled by config entry.

Edit: And now it shows correctly in HAM and has an icon. I did not change anything about that...