Can’t replicate. A video would probably help.
Why restrict this? There’s no benefit to disconnecting between waves before you cause any damage.
Early Bird only counts the time from start of wave to first kill, regardless of weapon. On some waves, enemies spawn further out, reducing the time you have available. Beam weapons can lock onto enemies partially outside the screen, so conceivably there is a benefit to firing them in advance.
Added to v.55 
Idea
Direction is random, and already evenly split 50%-50% between left & right.
Requires work. Added to list for later.
Pointless. To cause damage you have to be on the same level vertically as the yolk, so the enemy following you to that level only makes things easier.
Not worth it.
I already explained why I don’t want to add it.
Acknowledged. That’s a limitation of the wave engine – all enemies need to be spawned at once.
I’ve changed the way the bonus works to make this possible in v.55 Idea
Fixed in v.55 Bug
No. Only at the end of each wave.
It’s as transparent as it’s going to get. Perhaps on’t stand so close to the edge of the screen?
Ok, but bear in mind that episodes and CIU are on different timelines, so continuity is not mandatory. Fixed in v.55 Bug.
I like it there for consistency.
That’s how the wave is designed. “Droid Slalom”, for example, is different and the “weak point” can appear even at the edge.
Yes.
That’s how the wave is designed. Again, there’s no continuity between episodes and CIU.
Nah.
You can tell the direction by the way the bright sparks move.
Nah.
Added to v.55 Idea