A small vampire jumps through some levels (although it’s one big level with many doors) and he is collecting "skull-coins". This is a simple explaination of this game. But this game isn’t as simple as it looks. At the beginning you can’t jump as high as you may want. But that doesn’t matter... just press the left and the right key (as fast as possible) until you have a white symbol under your vampire ;D (while this symbol is shown, you’ll jump higher, run faster...). In some Levels you can find a red ball, collect it and you will gain a new enhancement of your abilities (shooting fireballs, higher jumping). The game reminds myself on the famous console-classic Castlevania. But in this game the dark levels are designed to fit also in kiddis-gameplay ;D. So you also have to play in beautiful colored levels and not only in dark castles.
Although the game tells his story in japanese, you can read the menu, coz it’s in english. The story is not relevant for surving in this game, so you needn’t knowledge in japanese.