Cool concept I think and maybe worth exploring further, but kinda confusing right now. I couldn't tell why planets would sometimes break and other times not, and same with them hitting me, sometimes hurt and other times not. An annoying bug is after upgrading, if you hit space right away to dash the upgrade menu opens again, unless you click outside it (I think because the button gets focused). Despite that though, it's a nice little game and congrats on submitting! :)
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Thank you! If it helps, the player will only take damage when they hit an enemy and aren't using the dash/attack. Enemies have a set amount of health, and until you upgrade the damage a few times, it will take a few hits to destroy the enemies. Thanks for pointing out the issue with the button, I've since (hopefully) figured out how to fix it