So I've been hacking at it for a while now, and I'm waving the white flag... sorry. Got up to the lava lab area after getting missiles, but couldn't kill a boss. Turns out you can save next to a boss and just camp them out til they drop, but not this boss, and I couldn't find any other ways forward. One frustrating thing about the world design is how easy it is to miss stuff. Falling into unescapable pits is very common, locking everything behind. I'm pretty sure that I've missed a lot of stuff due to these one way locks, and I felt painfully underpowered in that area. I started again, but ended up falling down the same holes, still missing stuff (I presume). I'm stuck relying on really dodgy tricks, like quitting to menu then going back in to get a free energy, so that I can save next to bosses. Thanks for the e fix, but I don't think I can beat the game...