Great art, punchy responsive audio and a really interesting take on bullet hell.
I usually don't really like the genre but this one had a great bit of tactic to it as well needing to time those recharges while also wanting to stay low HP for those hard hitting shots--a great take on the theme with that as well!
For me I sometimes got a little lost within the level as some of the areas looked quite similar, but I think a minimap may have damaged the visual style. As such I'd maybe suggest a way to speed up or something of that sort so that backtracking wouldn't become tedious if you did get lost. But then I suppose that'd be hard to integrate without it being a mechanic for the fights... So I'm not sure.
Really great, polished piece though, and you definitely nailed that poster!!