Okay, I started over and didn't take the Booster this time and it worked. So, taking the Booster was keeping me from advancing any further. Now, I keep getting stuck on a specific block in the Waterway:
I thought that's what I've been doing, but at this point I have no idea.
1.) Go to the door on the bottom level with green star boxes.
2.) Go through the narrow path on the middle level with green star boxes.
3.) Go to the door on the top level with green star boxes.
and it loops me back.
No, I reached the door at the top left where the last bit of green star boxes are, but upon entering it, I exit from the door with the destroyed robot next to it.
Started this yesterday and so far it's great (very Kaizo Mario-esque) but I'm stuck in Labrynth H. I got the Booster, but the final door just loops me back to the previous door and every other door goes back to the previous zone. Is there some trick to this?