My first step is to hunt around in Debian's repositories, and then, if there's an "armel" version for the "Unstable" or "Testing" Distributions, I go and install that in my Debian chroot. Most of the time, the game doesn't work very well on the tablet (most games are terrible resource hogs), but it's a lot easier to test it this way than to compile it from source ...

I'm almost positive that there's a Widelands .deb for the tablet out there, too, I think in the Extras repository?

EDIT: Yes, Widelands exists, along with "Stratagus" and "Battle for Wesnoth"