@yogsloth: You don't get energy from getting hit; you get energy from ALMOST getting hit. Specifically, from getting a bullet inside your ring (like scraping in Frantic). So fly around and get almost hit by lots of bullets (without firing), then once you've built up a lot of energy, unleash it all in a steady stream. The longer you are firing constantly, the stronger your bullets become.
After you buy a new ship, you have to upgrade it to unlock the new weapon slots. Once the ship is equipped, there is a little upg box right below it's picture in the upper-left.
Small Bug: When a buff is capped but should be higher, if I increase my mysticism the buff stays at the old cap instead of increasing to the new one until I take off my armor and put it back on.
BUG: I hired Bob the Builder, and earned enough experience to level him, but in the Tavern screen, I can't select him to level him up. My other two heroes work fine; it's just Bob.