Seeing that there is an unusual low return rate for this map, it seems that there are some difficulties in completing it (or it simply is not interesting enough?). This is surprising as there are not much enemies and most jumps are rather easy. As such I want to give some hints for the three different situations which might create the largest issues:

Beginning:
The turret right at the start is movable. For it to start moving you have to destroy the glass block left to it. You can do this by first destroying the glass in the wall to the left and do the shot from there.

Crossing the Lava:
There is a moving platform locked on the right side. While being on ground level simply shoot to the right and it will be freed.

Getting to the exit without being damaged:
The turret in the floor to the exit is moving as well. To get it out of the way, you have to do two things. First, you need to break the glass block above it. Then you have to use the switch in order to move it into a more favorable position.