Tip: Layer 3 backgrounds and tides disappear when you hit a message box, so plan your level around that. For example, you can add a sublevel without layer 3 at the start/midpoint, and include your message there.
As you might not know if this was your first C3, while C3 is technically "over", you can still post in existing threads and check out all of those threads you had to skip over due to the sheer amount of threads being made this time around!
The only thing that's really over is submission of new threads. Look forward to the voting period soon!