If you like SHMUPS and very nice tunes check out Iridion II for the GBA! I bought a prototype cart of it with many differents from final. It was first dev in US so the preview has many differents. Really lovely GBA game, here first shoots i made : Many different options from final, if you like to see more post here
I always liked Iridion 3D. Sure gameplay isn't the greatest but the visual design was a great idea. It made for some amazing screenshots for the GBA's launch. I remember oggling my Nintendo Power over the Gameboy Advance and Iridion was one of the more impressive examples. Thanks for sharing
Iridion II is one of the first GBA games I played when I had the system back then, and it was a great shmup. Good memories crying as I accidentally picked up the wrong weapon powerup when I already had an awesome weapon mid-stage and had to try to swap back while not dying. The tunes were pretty cool too. Hope there's some more nifty things in the build for you to look at.
Here some gameplay where i showing the three levels : The Proto has also a Forward Option you see in the video.
at the moment i dont have any backup device for the gba. I think the cart is from a pro linker device, not sure you can also dump with it? Anyway i dont have the device.