Pirates love it, downloaded tens of thousands of times on unauthorized numerous piracy sites!

8 levels of action
14 bosses
2 player co-op
high score multiplier
numerous skill levels
cheats and secrets to be discoverd
5 power ups
run and gun gameplay
complete and ready to launch (mac and linux port coming later)
steam cards and achievements to be added after release (need access to steam sdk to impliment them)

obtuse and overly convoluted story line only available from developer commentary and such, so in other words no language barrier