Absolutely incredible! I was expecting to get my arse kicked more than the game did to me - instead, the beginning was actually one of the sweeter ones I've played! The difficulty curve is just right for the 16-bitish style, but I really love how the octopus boss was, frankly, the hardest boss in the game for me, but I guess that's because the game didn't actually "end" there to say the least.
However, my least favourite part of the game is definitely the "press down + fire to dash", as I kept accidentally using it, when I meant to shoot while crouching as to make my hitbox smaller. I'd love if that was a toggleable shortcut instead. Very very great game!