The instructions are apparently gone so I'll try to write some here. I'm obviously not an engineer so I will mostly just make up terms that I see fit so if you are an actual engineer please don't get an aneurysm.

BASIC INSTRUCTIONS:

The goal here is to build simple circuits. You will get signals from some connectors (the gray boxes) and supposed to output the correct signals to other connectors. Each level will have them named in the instructions but usually A-D is input and X-Z is output. The "+VCC" connectors are always on and "N/C" connectors are always off.

The instructions on what to do is below the grid in the "specifications" tab. You build your circuit by drawing  with the tools on the big middle area. To test your circuit click on the "verification" tab and then the "run verification test" in the bottom. In this tab you can also see exactly what currents you will receive and you're supposed to put out. You can try this later once you learned to connect and manipulate current. We'll get back to the "design snippets" tab later. The video instructions under the "help" tab apparently don't work here but they're not very good anyway. The buttons under the "menu" tab should be self explanatory. Note that the game does not autosave your work if you exit to the menu so make sure to save it first if you want to keep it.

Your basic way of transferring current is by connecting metal. Metal simply transfer current. You select it by clicking the "metal" button or pressing 2. Make sure the metal is actually connected to the connector you want it to be so there isn't a small gap.


To remove metal click on the X button or press 5. Just hold shift and click (or shift + click and hold) to remove metal under the cursor with this. Shift works on other tools too to select a different version of the tool.


Another way to transfer current (and later manipulate it) is by using silicon. You select it with the silicon button or pressing 1. There are two kinds and you use shift to choose which one to put. Silicon can't be connected directly to a connector but needs to be connected to a piece of metal. Silicon doesn't connect to metal just by touching it. You need to put a "via" on the silicon to connect it to metal. Select via by using the button for it or pressing 3 and put it on a piece of silicon to add it.


Now it's time for the final basic instruction and you're ready to play. To manipulate current you use gates made of silicon. The good news here is that there are only two types of gates so it's not much to learn.

To make your first gate draw three squares in a row with red silicon. Now put yellow silicon next to the middle piece of these and draw it into the middle piece. Now put vias on all ends to be able to connect it. You can connect it to a connector and a +VCC with metal to test it. The end result should look like this:
(use "load a design" under the menu tab and paste this to load it)
eNrt2cENgyAABVARLs7QFXrvLN1/kVouvUBotESxT8Lp5UciyVdDuqfb8gzLI6Rp
yxg4OG8Lhjyu/nAEBQUFBQUFxwrmz7m5fmWNMRbnfl19HbX7vtNF/qyZXlrTdBzb
iXNrz1aqteFXdUkppf+tp6/KaJsopaqyUYatn3CbSClVlbaJUqoq2xoVKaV0kKrs
es7dWrZTP0rpDxupa1WW535tLTt2eDtQSsfWAxrpBe7qxoU=

This gate is closed by default and opens if there is current on the yellow middle pin. For those familiar with boolean logic you can think of this as a "and" gate.

The second type of gate is made by drawing three pieces of yellow silicon in a row the same way as above and connecting a piece of red silicon to the middle. I won't give an example here since it should be obvious by the above example how it should look.

This gate is open by default and closes if there is current on the red middle pin. To remember I think of this as a "not and" gate even if this is technically wrong since a current on the pin alone won't result in any current being output.

That's all there is now you can try things out by yourself.

You can save parts by clicking the "design snippets" tab then using the "select" tool to mark a part of your design and then drag it to the grid in the design snippets tab. You can also use the select tool to delete parts by marking it and pressing delete.

After you finish a level and get this confirmed with a "verification test passed" in the verification tab you use the "quit to main menu" under the menu tab to select a new level. More levels will unlock as you progress.


EXAMPLES:
For those that want to see some examples here are the solutions to the first two levels (note that I made these to look simple not optimized, you can do both with less parts)

Level 1:
eNrtmV0SgiAURuVeXlpDW+i9tbT/jZRiAyJoBYwVRwZFD58/c51P8NqLPZ9u5nQ1
dvik/LBw6zQmJ5S5xJ3Mii6Esiqbx3sMB0KECBEiRIiwRDgN5yS/TFRVk7Wcyrg3
bsZr2UHdasSei4ZcZYEz1T9UTAQKrUHtsIMfHUrk7nVvx/3tuY7Zh2+K60WloUll
zfEl94RCodC+6ddbpS4Oa0KrcT9CDIVC/88qt8wwmJGHbT8hl2h4roQYCoV2Z5WM
G6FQKFa5S6ffrYFnzrvPLJBbJGoTYigUeoRVVkt7z60o6R2NGxM5b4mm2mRqodCO
aZscdxWrTNdyyjcLCoW+Sw9wpDuYBsff


Level 2:
eNrtmUEOgyAQRQvDxjP0Ct33LN7/IrbUJhZBjVbCjA+iC19+IDh8hkx4hHvXu+7p
wm1PNyD0e4Ru7NYXByFChAgRIqwqXDxg10b0l17VmM75cotURLLPcfppry/xnY77
pW9BiZbmDIVCddBkh8/ojztUcaTcnDdZJRQKhV6bqrBK4SdCoYaphjtjI1a5ZIYy
xwQeFGrqAt6+kSqwSkILCiWrxCpXaVLSIbSgUFtZpZixygo1biUnCxQKPeEC7tMa
95T+twJ+slXmn+N047TTxJLAg0It0ekOb9ORBobjxl8=



BONUS/ADVANCED INSTRUCTIONS/TIPS:

Something you might have already noticed in the first few levels that will actually be important later is that there's occationally some delays. This is because the gates take one "tick" to open or close. There is no other delays. Making a very long metal/silicon connection will not delay the current at all. Note that the delay is from opening or closing the gates so just having a current travel through a already open gate will not delay it.

Metal, silicon and gates have no sense of direction. If you connect a current late in a connection it will still travel backwards and possibly mess up the functionality of your circuit if you don't keep this in mind. Note that this also applies to connectors so two different circuits connected to one output connector will also feed current into eachother.

If you need to save space or have wires cross eachothers you can use silicon just for delivering current. It's easy to forget this.

Be creative with the form of your gates. While there are only two kinds you can add them creatively, like making a gate of the middle pin for a simple way to let three signals decide the output.