See also the official FAQ, and the github FAQ.
How do I Rotate?
- You can rotate a component before it is placed with the hotkey, which by default is .
- A single placed component can be rotated the same way provided it is not connected to anything else.
- A group of connected components and wire can be rotated by selecting, cutting, rotating and then pasting it. By default this is
-drag, , , - Any wire connection internal to the selection will be preserved.
- However this will break any wire connections (and watch links) between the selection and the rest of the circuit. You cannot rotate a selection without disconnecting it from the rest of the circuit.
I've finished the last level but my profile says "Complete: 95%"
Some levels have not syncronised with the server for some reason. To resubmit them go to the game Options → Score Sync. This will show Resubmit for the levels that the game is resubmitting. This fixes this issue most of the time.
TODO: Other options to try if this doesn't resolve it.
What are the extra RAM input/outpus for?
They allow the RAM to load and store words wider than 64 bits on 64 bit wires.
RAM, Latency RAM and Fast RAM have 4 Input value and Output pins. Only the first is used when the data width is set to 8, 16, 32 or 64 bits. The first 2 are used when the data width is set to 128. All 4 are used when it is set to 256.