Thanks for playing and the feedback.
The bosses can be hard without upgrades. It is generally a good idea to warp back to the station to upgrade before fighting a boss. If you get to one, then warp right away while dodging. You will repair and recharge at the station. Then, you can warp back to where you were, in the boss fight, at full power. I'd recommend getting either more energy storage or shields as your first upgrades, depending on what you can afford.
FYI, you can click the fake, in-game only "ads" for 10 free scraps, each time you visit. They just pop-up a message in this version and don't go anywhere else.