Fun until it is not.
However, once you get the whole context, everything will be different, all level ups skills in the game start to be the same skills over and over again, all the new skills only shows once at the very first time you unlock them, then they will never appear again, like the vampires skill, from all the game I played, it only appeared once after I unlocked it.
Same with all power up items, all the new one you unlocked almost never show up.