Well-made game! The controls were responsive, the strong momentum provided some challenge when trying to avoid walls. The metroidvania-like level design was interesting, and I liked looking for upgrades. The music was good, too, though felt a bit more gothic/medieval than sci-fi to me. The first turret surprised me with its ruthless fire rate (which was a good thing).
There could have been more hazards and enemy types, like falling stalactite and enemies that follow or charge at you, for example. I was kind of hoping to a weapon or some other way to destroy/disable the turrets, too.
The planet in space was very plain, some details would have made it much more interesting.
The Itch page description and the beginning of the game made it seem like there might be an interesting story, or lore, but I don't think I really learned anything of the ancient civilization other than they were technically advanced, very protective of their cosmic keys, and tended to leave useful stuff lying around in random places. Some cryptic data files, strange murals, and maybe even skeletons would have given more food for the imagination.