I'm already stuck at the beginning. After collecting that battery there, I don't see where to go next: I can either just jump around randomly without getting anywhere or touch that red guy twice to die. But I don't see how to advance.
Okay I managed to do something that akes rocks disapppear/kill close enemy. But I still don't know how it works and it only seems to work rnadomly. I also don't see how exactly it's linked to the decreasing bar in the menu.