Way overdone, man. The thwumps seriously restrict mobility, and the oneways make this too directional. Make it more open-ended and take out the oneways. It's nice to be in control of where you go. Also, I'd suggest taking out at least some of the thwumps - the gauss turrets, mines, and jagged terrain are already challenging enough to navigate. And that thwump in the beginning really sucks. Like, it's horrible to start out a level like that, and to have to end a level with a thwump right on your tail. So take out that first thwump.

Otherwise, this isn't bad, man. I enjoy it, but it could use a bit of work.