Those blood particules where AMAZING!!
Sometimes the main character get stuck and if you miss the spot where you were supposed to place a specific object then it's alt+f4 and restart the whole game. (oh and a bit of audio would be good (death sounds, platform sounds, maybe music? ))
Besides this, the concept is great, the visuals are on point, and i think it fits the theme perfectly. Good luck on your Game Dev journey! ^^