Yeahhhhh, I agree. Originally you were encouraged to not spam rotation because 1) the space key didn't exist so you automatically shot when rotating 2) there was significantly less dust, and 3) You didn't have an iron core, and therefore died if you spun out all of your matter.
1 and 3 were changed because the early game was too difficult without them, and 2 was changed when I frantically added the upgrade system in the last 4 hours of the jam. I also agree that having to switch to your mouse to choose a card is really annoying. If I had any time to playtest this at all, I 100% would have changed the control scheme to be only keyboard, or left hand keyboard right hand mouse. It's also made worse due to the xp system not scaling and properly, making it so you spam levels up instantly from like level 40-80. But it's okay. I'm glad you had some fun atleast