The game is hard and it kind of gets boring when you have to not die back track so many obstacles, so many times. But still the music, characters, game mechanics (power ups I mean) and the minor details still are what kept me playing, so I'll give you points there.
You know that red room which is accessible through a secret blood spot in the place where headless horse man's head is? I will say after sometime yes you get better at that level but my issue is this, the final blood jump where you need to time your jump not to avoid the garlic pizza but need to quickly press shift as not to die due to pizza is way too hard, even if a check point was added there that final jump is way too annoying.
But personally the worst thing is that the progress doesn't save when you leave.
Still a good game, just really punishing and constantly backtracking is really annoying.