Im not familiar with your device, is the big thing in the middle on the bottom a trackpad type device? I.E. can you use it to scroll a long page if you rub your finger over it like you would a laptop trackpad?
If so then rubbing that thing with an upward motion should send the DPAD_UP event, which I assume that game is listening for. You might also try pressing on the top edge of this button thing, perhaps the whole thing is a dpad of sorts.
If that thing isn't able to scroll at all then Im afraid you're probably s.o.l. The game is listening for an event that your device is incapable of sending. If you are interested in development then let this be a lesson to consider all device types and input schemes when designing your interface.
{rant} What is with the trackball hate? The first several devices had trackballs on them, and it was an excellent input method, now they've moved them all to this optical / touch sensor crud {/rant}
EDIT: So even if your device doesn't have any type of trackball type device you aren't entirely SOL after all. https://market.android.com/details?id=com.pedrocorp.virtualtrackball&hl=en that is an app that will give you a virtual d-pad or trackball. There might be a free one if you search around.
P.S. if anyone with influence over hardware design happens to see this: Making a device with no d-pad type input is terrible, it makes so many interactions needlessly awkward. Please don't do it.