Alright so since you decided to update this thing here's what I think of it now.
-When there are enemies on the screen the music is overbearing and cacophonic. When there's no enemy, the little "mystery theme" doesn't fit the game too much, but it's still an upgrade compared to before.
-Still one single enemy type, still no variation in the gameplay whatsoever. They're still so easy to beat to a pulp.
-The game only lasts what, 20 seconds because once you kill 10 enemies the door opens, but there's nothing afterwards, you can't go thru the door frame, it wasn't programmed into the game.
-Like the description mentions so nonchalantly, you can't die, when your health bar reaches 0 it goes negative with the bar going more to the left the more you take damage.
The graphics with the noice pixel art are still the best part of the game TBFH.
EDIT: Dude, take notes from the Binding of Isaac.