I hate Extra mode. There is just way to much shit flying across the screen, even the beginning is a pain with these annoying three-way suicide bullets and the ultra-dense spreads from the big helicopters that spawn in random places

Adding to that, the missing vertical space and the small screen somehow really becomes a problem here.
I stopped playing it when I watched someone clearing it on Nico video and realized that I´m neither skilled enough to do it myself nor bored enough to torture myself with fighting the most pissed off DOOM in the whole game on a theoretical maximum of two lives.
I think it shows how well the rest of the game is made, because I´m still enjoying Very Hard and Death Label a lot. Yes, the screen is often covered in bullets here too, but I never completely lose orientation of what´s happening like in Extra mode, and I don´t feel like I have to press my nose against the small screen to see a two-pixel gap somewhere in a mess of bullets and enemies.