I was browsing through my game screenshots folder and remembered this nice little gem of a freeware game.
http://www.acid-play.com/download/akuji-the-demon/
I think you can get it in that page. As the review there points out, the game is too easy and short (you can always try for the S rank, though, as I did). But it is rather polished and has touches of Metroid / Castlevania games where you get more abilities and access to other places.
In any case, it is free, so just give it a go if you like platformers.
Ivo.