Good job! Here are my thoughts:
1) It would be nice if player could hold the mouse to spawn orbs rather than having to click.
2) There are too many enemies in the game...
3) Great work on the visuals! There was definitely a calm before something bad happened...
4) The "more blood" button is not working properly.
5) Nice feature to save your progress if you die.
6) Red enemies don't affect the counter.
7) I killed 50 enemies, but nothing happened :(