If you're powering with a USB battery, solder a red power wire to USB. If you're using the JST connector battery port for a LiPoly battery, solder to BAT instead.

Split the power wire, then split each wire twice more so you have 8 connections total, one for each LED strip.

Wire your momentary switch to pins A2 and A3. It doesn't matter which leg goes to which pin. 

Cover your connections with 3/4" heat shrink and fill in the gap with hot glue. This button will probably get tugged on a lot and we need to make it bulletproof.

Finally, we'll need to attach each of the pixel strip sections to the Feather. I started by making the strips, then pinned them into place before trimming the wires to minimize extra wire in the project. The seven drip strips attach to pins 0-6, and the 8th "ooze" strip attaches to pin 7. The pins each have their own corresponding Ground pin located just below each data pin.

The third 5v wire from each strip will attach to one of the power wires in the "squid" you just made.