Off-sync, but too easy
I beat the game (All seven songs) on my first try.
If the synching were any better, I'm sure you could too, but really... I like DDR and StepMania, but this was not very inspired. The only originality is the checkpoints thing you have set up.
To the guy that mentioned the "miss stream": I did not get such an error. I only missed one note, and it was during the Zelda Dungeon Remix, at one of the parts you mentioned.