Good Concept, and YES there are instructions.
I got the basic idea of it, is you can use bullets as platforms. Interesting concept. I have no idea what people were complaining about there being no instructions, because they WERE in the level, if they had paid attention the "Z" and the little arrows and "X" referencing the controls. The only controls unmentioned is that the arrow keys are used to move. I liked it. A little frustrating at times, but it was a good game, overall. The music didn't seem to be repetitive, which is strange because it's the same song looped over and over.
Good game!
8/10