Why are so many people here so pussy-whipped? flamewolf393, "experienced" gamer? You are a person who is CLEARLY not used to how difficult games really were before your goddamn Calls of Duties and Battlefields.
This game brings back the traditional flavor of retro games quite well. It has a slice of Castlevania with a very similar style to Ninja Gaiden, and in fact feels a lot like Ninja Gaiden. For you people who found it hard, I actually found it a bit easier than the titles I just mentioned.
Anyways, the story. Forget the story. Gameplay is smooth, music has that old-school feel and it works very well with this as expected. It doesn't bring anything new to gaming, afterall it is an inspired piece based off of old games. My only real gripe is the fact that when you gain a new weapon, there is no option to change to your regular sword, or even a secondary weapon. Of course, to balance this, an ammunition system may have been required, but I guess it's fine since new weapons gained have unlimited uses. Although that does not justify the inability to use your standard sword. Furthermore powerups are forced upon you, so you can't switch to old ones, etc. If you're not careful you can end up getting a weapon that is not at all useful for the current situation.
On the other, really good work, keeping it real simple. The password system is a nice throwback to how older games didn't have save files, and it's debatable whether or not it should be kept in a future installment or other games you may create.
Difficulty is not an issue. Again I repeat, I found this easier than a lot of other retro games.