upgrades honestly gave me a headache and i scratched all my hair out to implement the bounce (there is still a bunch of balancing left and many physics bugs i couldnt fix in 2 days)
and about the theme i thought that these kinda games are like basically imminent doom and my game has a somewhat of a linear difficulty (even with some relief waves in between) so i thought that the doom/game over is basically garuanteed in this game
maybe i interpreted the theme a bit wrong tho
and also the vector graphics, i have to be honest, i took inspiration from this game called NodeBuster on steam (enjoyed that game and loved the graphics, so had to try it for myself)
i also tried to add glow (couldn't figure it out) T_T