Played in chrome and after level 9 it wouldn't load the next one. 

As I've said before, the music is awesome. Liked the soft/quiet music in the credits as well. Really interesting mechanics being able to fly over walls and using up your health to 'x-ray'.  

Feels like it needed some other mechanic or puzzle aspect to make it more engaging though as the player can just fly to the end of the level. Still, had a good time with it and hope it gets worked on more! Lot of potential.

Wanted to expand on my earlier feedback for Comment Club. :)

Least favorite: Overall, I felt it was quite easy. I didn't really feel like there was any danger of running out of blood. There are a lot of levels that have enough enemies to replenish any missing blood. Spamming the bat button basically ensures nothing can ever hit you, and if you do happen to descend on an enemy they'll die. I'm usually not a fan of time pressure in games, but adding more things that drain your blood as well as limiting the bat ability or adding some risk/reward would probably make it more engaging.

Most favorite: As I said previously it looks so great with such minimal assets. I love 1 bit styles and it's done so well in this game. The shadows look great. The music fits the overall feel of the game so well. The presentation is just well done all around.

Unfortunately, level 10 didn't load for me. BUT, in those 10 levels, I managed to get a feel for the attack controls and soon felt like some kind of ninja vampire!

Very nicely done! The graphical design is perfect for procedural generation and the gameplay is simple in a way that gets the player more and more excited the faster they go. I enjoyed it!

Eventually ran into a bug on the web version that it just didn't load the next level. Love the sound design and a fun idea.