It’s extremely well crafted. I’d argue it has the level of polish you’d expect from a very well made modern release. That is not the case with a lot of Genesis era shmups.
I am curious how some of the effects look on a CRT.
What I notice is that the highly detailed sprite work doesn't produce the elegant artifacting of the era, where pixel bleeding and whatnot would merge nearby colours together to produce desired artistic effects. More often what I see is a smudged mess with noise.
Generally pixel art created for LCDs also looks good on CRTs, with tiny text being an obvious exception.
While it may sound odd to want new pixel art to be "authentic" in the same way as new music should respect the structure and form of styles like ragtime, blues or jazz, I think it applies equally. The skilled artists who hand-crafted pixels to look their best on CRTs did specific things to leverage CRT bloom and blending, scanlines, composite color artifacting and interlace dithering.
By the way, some of my favorite games on Megadrive are homebrews, most notably Astebros and other Neofid games.
This might be different given it’s a company logo and thus trademark. But I wouldn’t be so sure they’d get a cease and desist like if someone imitated Nintendos logo.
You don't even need to buy the cartridge version if you own an SD card adapter.
R-Type wasn’t the inventor of the genre and it’s far from the last entry in it too.
Working to the limitations of 16-bit consoles to produce a modern-feel of game play is something that cannot be vibe coded.
However, "a Mega Drive game!" is a great sales point to the majority of people invested in the nostalgia market, with only a surface-level interest of what these games are. It's why it made it to the font page of hn, and not it's perfect 'traditional' sprite art, or its Yuzo Koshiro soundtrack.
I like shmups because they are pretty much "pure game design"; games are such a complete package of story, interactive experience, etc that it's hard to separate what comes from where. This is what makes design experimentation so interesting and rich.