Oh thank you , it's nice to get feedback on these little games! Definitely a 'Tapper' feel to that one. "Outpost" on Apple II is the one I had vaguely in mind when I made it. (edit: whoops, I'd already written that in the main post)
I was worried about Firebird being too similar to Rocket Panda. Desperately tried to come up with some different enemies, but without much success :)
Great to hear about Wacky Races being played.. you may be the first people ever to have actually played a two-player game without being paid to do so!