I think that's just poor design choice

Who decides who comes to this country? This seems to make sense given there appears to be an immigration stamp printed onto the card

I used to own this game as a kid! It was a lot of fun, especially when you first meet a new boss and it's the most bizarre, out of place character. I have so many fond memories of it. It's strange to think the only reason I had it was because the box art looked really interesting. I guess that was also the case for most games at the time. I never knew until years later that it was a parody of gradius.