I was lucky enough to play Gradius 2 on FC back in the day. A Japanese friend I knew in elementary school had a Famicom and so did I. His uncle sent him a copy of Gradius 2 back when it came out and I got to see and play it at his house. Eventually he let me borrow it
Then when summer rolled around, I got to go to Asia again with my grandmother and was able to get a copy myself.
The android version of Salamander is actually suprisingly nice and even works on the OUYA console. The quickest way to play it there is with a keyboard with a builtin swipe mouse pad. It also works on the Bluestacks Android Emulator and you can even map the swipes and taps to keyboard buttons which in turn can be mapped to a control pad/joystick via joy2key or keypadder software. Played it quite a bit back when it came out. A shame it didn't get a proper release other than mobile....
It's a lot like the 3D Contra 1 remake for Android and iOS from several years ago which imho is quite good... but you really need to play the arcade version of it (only released in China). The arcade version (which has been tweaked to work on a normal PC, as most arcade games just run on a PC anyway these days) has tweaked controls and a much higher weapon firing rate which really makes the game shine. Also more interesting between level maps and what not vs the mobile version.
A bit back on topic, some unusual Gradius 2 items I've picked up over the years and some very unusual Gradius 1 stuff for shits n giggles
An officially licensed Gradius jacket. Ignore the glowing effects and watermarks I made on it for Instagram lol. This jacket was released by Game Glorious Japan a few years ago. I've actually another one (the black version) on the way.
Gradius the boardgame