That was pretty neat! Really liked the art aesthetic, including the blur effect you used when rewinding the flow of power. Audio was nice too. I think there are some very cool potential levels that you could make with this game idea! :)
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BTW, if you decide to review my game (which I'd appreciate) you can play a web version here (its the exact same game, bugs and all): https://moocow17gmailcom.itch.io/rewind-bullethell-web-version
(with my official jam game here: https://moocow17gmailcom.itch.io/rewind-bullethell ).