Castlevania is an amazing series, and though Simon's Quest is not the optimal game to be ported, I can understand the author's choice.
It is a simple game, and there is no leveling, yet lots of monsters, so a lot of time will be spent purposelessly. The difficulty is actually too hard, and there is no significance in the number of lives you have.
Besides the difficulty, this is a neat little game to pick away at during school... at lunch time, of course!
Speed: 9/10
Good speed, background blurry when moving, hard to see.
Gameplay: 6/10
Really hard
Replay: 6/10
Just the same as playing it the first time.
Graphics: 10/10
Great graphics!
Resources: 8/10
Large, but only 1 file. Its good.
Overall: 7/10
Not as great as some, but overall worth a try.