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[cymon]

Hokay. I don't want to spoil the game for anyone, so I'll just post links.

Levels 1 through 16 are pretty hum-drum:
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
Level 8
Level 9
Level 10, 2 nots before and a not after? Pretty sure I could reduce the gate on this one somehow.
Level 11
Level 12
Level 13
Level 14
Level 15
Level 16 - Did I hear someone say they had pulled this off with 2 switches?
Level 17 - Kinda proud of that one. Created an oscillator to shoot the bottom engine less often than the side engine.
Level 18 - Now I'm getting creative. I could have modified home run, but why when I can just take a more direct route.
Level 19
Aaand...
Level 20

And that's as far as I've got. Did you do one better? Can you help me get past that blasted devil's gate?

[cymon]

Finally beat Level 21.

Most complicated solution. Ever.

The circuitry follows a clockwise direction around the corners once the gates are opened. Don't know why, but that seemed most natural at the time. In the lower right is the "if no sensors are active (in front of open door)", in the lower left is the "turn off all sensor/thrust responses." Left of that is the switch to start the clocks, and in the upper left is the clocks that managed to get you to the exit gate.

So for level 21 I've got to make a left hand search algorithm? Oh good grief.

[mikybee93]

Heh, i did 16 with two switches. Think, with two switches you can have 4 possibilities. Say each switch has 1 and 2, for both settings, and so I did it like this.

[Go up] 1+1
[Go right] 1+2
[Go down] 2+2
[Go left] 2+1

Pics!

[OneGirl]

Heh, i did 16 with two switches. Think, with two switches you can have 4 possibilities. Say each switch has 1 and 2, for both settings, and so I did it like this.

[Go up] 1+1
[Go right] 1+2
[Go down] 2+2
[Go left] 2+1

Great stuff, mikybee! That's thinking like a hardware engineer. There's always a way to shave off one more gate.