I feel like Tewi's second attack might be a bit unbalanced: I often get really walled. It's harder than anything else in the game (on Normal).
Charge attack feels too slow to be fun to use. Maybe if the player could fire while charging, but then there'd be no downside to just charging up just in case (and release before reaching 100% in case the charge was not needed). Maybe just let the player charge more quickly and balance the game around that. It also wasn't clear to me how or if the post-charge state has any scoring or survival benefits.
The top of the screen location of the charge meter confused me. I couldn't even find it at first. Swapping boss hp bar and charge bar location would be more in-line with a touhou player's expectation, but maybe you need the boss HP bar to be easily visible so the player can time boss kills for cancels?
Also, not sure about the shot customization. I spent my points in the unfocused shot to make the stage sections more fun, but then I felt tempted to dodge boss attacks unfocused and rammed into bullets as a result. Sure, it's my fault, but the customization system kind of incentivizes this and I suspect the game would be better without the ability to spec into focused or unfocused to not tempt players into min-maxing this and thus feel like they should only use half of their shot type.
I played the latest version, and I the game just ended after beating Reisen. Since jam games can sometimes be buggy, it's good to signal that the game was supposed to end there with a small 'YOU WIN' screen or something. It felt abrupt and unintended, as if the game ended mid-fight. A more obvious climax/final spell might also have helped to round the game off.
Also, Reisen's first attack comes out too quickly after her dialog, but you know this you danmaku troll.
