HI! I've been getting in touch with my inner ninja lately...
https://store.steampowered.com/app/622870/Pixel_Shinobi_Nine_demons_of_Mamoru/
Damn fine game gents, do give it a go... It looks like it uses the same engine as Broforce, very retro (and quite gory haha) 2d platformer with slight RPG and crafting elements with a vibe that harkens back to Sega's Shinobi. Important to note, the difficulty is quite hard, even on easy I got my rear handed to me with blood sauce quite often.
The abilities of Hideaki (main character/ninja/YOU) are quite satisfying, nothing like being suspended upside down just above your enemies right before you swoop in and take their life in a split second. XD
最後の悪魔にそれらを虐殺!
-Tri